# Price calculators

Each one runs on the live prices we track, not list prices, so the answer changes as the market does.

 [**Collection value** Cards, sealed LEGO, retro games and coins you own, priced at today's eBay listings.](https://sharpest.ai/collection) [**Rent or buy a GPU** Break-even hours with electricity, Vast.ai/RunPod vs eBay, for 40 cards.](https://sharpest.ai/cloud/rent-vs-buy-gpu) [**Buy a GPU and rent it out** Monthly earnings and payback at your utilization and platform cut.](https://sharpest.ai/cloud/rent-vs-buy-gpu#rbcalc) [**GPU rental per hour** Cheapest on-demand rate by card and memory tier.](https://sharpest.ai/cloud/gpu-per-hour) [**Solar payback** Years for panels to pay for themselves at today's $/W and your power rate.](https://sharpest.ai/calculators/solar-payback) [**Home battery (ESS) payback** Time-of-use savings, cycle life and cost per kWh stored at today's LiFePO4 $/kWh.](https://sharpest.ai/calculators/battery-payback) [**Solar panels: price per watt** Rigid, folding, flexible panels and kits by $/W.](https://sharpest.ai/per-unit/rigid-solar-panel) [**Batteries: price per Wh** Power stations, LiFePO4 and home batteries by $/Wh.](https://sharpest.ai/per-unit/portable-power-station) [**Shuck or buy bare?** External drives vs internal drives, per TB.](https://sharpest.ai/storage/shuck-or-bare) [**Liquidation lot calculator** Is a pallet or lot worth it at its asking price?](https://sharpest.ai/lot-calculator) [**Price per unit: staples** Groceries and household items by price per ounce, count or sheet.](https://sharpest.ai/per-unit) [**LLM API cost** Price per million tokens across models.](https://sharpest.ai/cloud/llm-tokens)

## Price per unit by category

- [GPUs: price per GB VRAM](https://sharpest.ai/gpus/price-per-gb-vram)
- [RAM: price per GB](https://sharpest.ai/ram/price-per-gb)
- [SSDs & Hard Drives: price per TB](https://sharpest.ai/storage/price-per-tb)

## Used vs new vs refurbished

- [3D Printers & Lasers](https://sharpest.ai/makers/used-vs-new)
- [Apple](https://sharpest.ai/apple/used-vs-new)
- [CPUs](https://sharpest.ai/cpus/used-vs-new)
- [Cameras](https://sharpest.ai/cameras/used-vs-new)
- [Consoles & Handhelds](https://sharpest.ai/consoles/used-vs-new)
- [Drones & Action Cams](https://sharpest.ai/drones/used-vs-new)
- [GPUs](https://sharpest.ai/gpus/used-vs-new)
- [Golf](https://sharpest.ai/golf/used-vs-new)
- [Headphones](https://sharpest.ai/audio/used-vs-new)
- [Kindle & Smart Home](https://sharpest.ai/smarthome/used-vs-new)
- [Kitchen](https://sharpest.ai/kitchen/used-vs-new)
- [LEGO](https://sharpest.ai/lego/used-vs-new)
- [Laptops](https://sharpest.ai/laptops/used-vs-new)
- [Monitors](https://sharpest.ai/monitors/used-vs-new)
- [Music Gear](https://sharpest.ai/music/used-vs-new)
- [Phones](https://sharpest.ai/phones/used-vs-new)
- [RAM](https://sharpest.ai/ram/used-vs-new)
- [Retro Consoles](https://sharpest.ai/retro/used-vs-new)
- [SSDs & Hard Drives](https://sharpest.ai/storage/used-vs-new)
- [Server & Homelab](https://sharpest.ai/homelab/used-vs-new)
- [Single-Board Computers](https://sharpest.ai/sbc/used-vs-new)
- [TVs](https://sharpest.ai/tvs/used-vs-new)
- [Tools & Power](https://sharpest.ai/tools/used-vs-new)
- [Vacuums](https://sharpest.ai/vacuums/used-vs-new)
- [Watches](https://sharpest.ai/watches/used-vs-new)

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As of 2026-11-05. Canonical page: https://sharpest.ai/calculators