Comparison

SoldSheet vs AuctionNinja

An estate-sale and auction marketplace, strongest in the Northeast, with low monthly pricing plus a percentage of each sale.

AuctionNinja's marketplace brings real bidders, especially in the Northeast, and its entry price is low. But the economics punish small sales — 2.35% of hammer with a $75 minimum per auction — and sellers process payments on their own merchant account, carrying chargebacks alone. SoldSheet charges no percentage, has no minimums, and pairs invoicing with payments that are managed, not just bolted on.

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Where AuctionNinja wins

An owned marketplace with an active bidder base, particularly strong in the northeastern US
Lower monthly entry price if you run large sales infrequently

Where SoldSheet wins

No percentage of hammer and no per-auction minimum — their $75 minimum makes a $1,000 sale cost 7.5%
Payments designed around your Stripe account with the workflow handled, not left to you
Publish to multiple marketplaces instead of living inside one
Consignor settlement statements — their tooling is seller-facing, not consignor-facing

Side by side

Capability	SoldSheet	AuctionNinja
Cost per auction	$0 beyond the subscription	2.35% of paid hammer or $75, whichever is greater
Monthly price	$99 flat	$19.19/month plus $250 one-time setup
Chargeback handling	Surfaced in-app, managed through your Stripe dashboard	Seller's own merchant account, seller's problem
Marketplace lock-in	None — export anywhere	Bidders, feedback, and SEO live on their marketplace