Callisto is a dedicated B2B trading platform for buying used smartphones in bulk. Source used, refurbished and damaged mobile phones from OEMs, carriers, and retailers, with consistent grading, transparent lot detail, and escrow-secured payments on every transaction.
Every device is tested, wiped and graded before it reaches the marketplace. Whether you need current-generation iPhones for retail resale, mixed-grade Samsung lots for refurbishment, or legacy models for parts recovery, you can see exactly what you're buying before you commit.
Buy through instant catalogue listings, submit offers on bulk lots, or compete in live and silent auctions. One platform, multiple buying routes, with inventory from locations across the UK, Europe, Americas, MEA, and JAPAC.
Source high-demand smartphones across a wide range of grades and models. From current-generation to high-volume legacy devices, supply is available to support different pricing strategies and market needs.
Strong wholesale demand due to superior performance and camera specs, priced below current-generation models. Suited for wholesale bueyrs targeting consumers wanting a newer titanium iPhone.
Strong wholesale demand for Pro-tier performance and build quality in a compact size. Suited for traders and eCommerce sellers targeting buyers wanting a recent-generation Pro iPhone.
Strong pick for traders and ecommerce sellers, offering a large screen and current-generation chip that end consumers want, at a price point below the newest models.
A solid pick for traders and ecommerce sellers, this recent-generation iPhone appeals to consumers upgrading from older, non-USB-C models worldwide, backed by strong availability across grades.
A consistently traded newer generation model with strong resale value. Mixed-grade availability supports different pricing strategies - from Grade A retail-ready through to Grade Dx for parts and repair.
Pro-tier with Dynamic Island and always-on display. Strong global resale value with a 6.1 inch display, A17 Pro chip, titanium frame and ProMotion display. Widely available across all grades.
Traders and ecommerce sellers get a cost-effective sourcing option in this large-screen non-Pro model, appealing to consumers who want a big-display iPhone without paying Pro pricing, with steady supply across all grades.
Available in volume lots at a lower per-unit cost than newer Pro variants, this older-generation Apple model offers buyers consistent supply across all grades globally to meet steady end-consumer demand.
Previous-gen Pro Max with ProMotion display and triple camera. Strong wholesale demand due to the balance of premium features and favourable secondary market pricing.
Compact Pro model with macro photography and ProMotion. A popular sourcing option where Pro features are available at strong wholesale pricing.
A popular Apple model that balances strong demand with favourable wholesale pricing. Widely traded across all grades, from retail-ready units to damaged lots for refurbishment.
Wholesale buyers can capture consistent global demand with this last compact Apple model, offering a 5.4-inch form factor, A15 chip and dual camera, appealing to consumers wanting a small iPhone with no current Apple alternative.
Legacy Pro Max with LiDAR and sensor-shift stabilisation. Trades in volume across mixed grades. Useful for resellers who can offer a premium-spec device at an accessible retail price.
Stainless steel build with triple camera and LiDAR. A mature model with high availability and competitive wholesale pricing. Strong for resale or refurbishment programs targeting mid-price retail.
A high-volume legacy model with the broadest grade coverage on the platform. Widely sourced for resale, repair and parts recovery. Competitive per-unit pricing driven by volume availability.
Wholesale buyers can meet strong global demand for this compact 5.4-inch handset, offering full 5G support and solid capabilities, appealing to consumers wanting a smaller phone without compromising on performance.
Apple's first triple-camera Pro Max. Deep legacy supply at accessible wholesale pricing. Popular for budget refurbishment programs and emerging market resale where price sensitivity is high.
5.8 inch OLED display, A13 chip and triple camera. Consistent wholesale demand from buyers processing legacy Pro-tier stock who still value triple-lens cameras at low cost, with reliable long-term global supply.
An established legacy device with broad supply. Popular for budget resale markets and repair programs. Consistent availability at accessible wholesale pricing across multiple grades.
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Apple's budget-tier with A15 chip and 5G in a compact body. Strong demand from enterprise buyers and education markets. Touch ID model appeals to specific buyer segments.
Samsung's premium model range with titanium frame, S Pen, 200MP camera and Galaxy AI. Strong secondary market supply with interest from Android-focused resellers.
Large-screen newer generation device with Galaxy AI and QHD+ display. Positioned between the standard S24 and Ultra - appeals to wholesale buyers and traders sourcing premium Android devices.
One of Samsung's compact newer generation models with AI features and titanium build. Strong secondary market availability with growing supply as trade-in programs and lease returns increase.
Previous-gen Ultra with integrated S Pen and 200MP camera. Strong wholesale volume and broad grade range supports multiple buyer profiles and markets.
Mid-tier premium model with larger battery and display than the standard S23. Good availability across grades - popular with resellers targeting the premium Android segment.
Samsung's compact model available across multiple grades. Popular across all global markets. Dual-SIM variants available.
The first S-series Ultra with integrated S Pen, replacing the Note line. Mature supply with strong availability. Suits wholesale buyers sourcing premium Android at competitive wholesale pricing.
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Large-screen and steady supply from carrier and lease return programs. Reliable sourcing for Android resellers with good availability across all grades.
Compact Samsung model with good availability across all grades. A reliable sourcing option for resellers targeting Android markets with competitive wholesale pricing.
Legacy Ultra with 108MP camera and S Pen support. High-volume legacy supply at competitive pricing. Useful for wholesale buyers processing older Samsung devices across mixed-grade lots.
Legacy device with established secondary market supply. Competitive wholesale pricing makes it accessible for budget-focused resale and emerging market distribution.
Samsung's compact foldable with larger cover screen. Growing secondary market supply as foldable adoption increases.
Samsung's premium foldable with tablet-sized inner display. Consistent demand in the secondary market. Appeals to enterprise and premium resale channels.
Samsung's A series range (A55, A54, A34, A25, A15) offers high-volume supply at accessible price points. Strong demand in emerging markets and from buyers processing mixed-brand lots.
understanding our inventory
Inventory on Callisto spans a range of conditions from trusted sourcing channels. Each listing includes clear condition detail so you can buy with confidence, whether you're sourcing for resale, refurbishment, repair or parts recovery.
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