All toolsInventory & profit

SixBit

$29.99/mo

Windows desktop inventory and lister for eBay, including parts fitment.

https://www.sixbitsoftware.com/pricing/

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What it does

SixBit is desktop software for eBay listings, inventory, orders, and, on higher editions, profit reports and fitment data. It runs on Windows. The pricing page lists five monthly editions and a 30-day trial for new customers. A card is required, and you are not charged until the trial ends. There is no sales commission.

Price

Home & Hobby is $29.99/mo. Small Business $49.99, Enterprise $99.99, Enterprise Duo $139.99, Enterprise Max $184.99. Duo is the edition that adds a second selling site. 30-day trial, card required.

Marketplaces

eBay
eBay Motors

Pros

Offline desktop database, which still matters if your catalog is large and your internet is not.
Fitment support is called out for parts sellers, and the subscription does not take a cut of sales.

Cons

Windows only. The requirements page lists Windows 8, 10, or Server 2012 and newer.
A second marketplace is an edition change, not a checkbox on the cheap plan.

Last checked Nov 14, 2026.

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