Total Price is what a buyer actually pays: item price + shipping + marketplace fees (Mercari charges buyers a 3.6% Buyer Protection fee on the item + shipping; eBay has no buyer fee). Pinny Shop ships free on orders over $59; below that a flat $6 shipping is added. Tax is not included. Shipping costs are estimated with Seattle, WA as the destination and may differ for other locations. A listing with no shipping figure is one we have not been able to retrieve yet.
Sold is the marketplace's own record: Mercari's sold listings, and eBay's count of units sold on a listing we tracked. Probably sold is inferred: an eBay listing that ended before we could ask eBay about it, and disappeared and stayed gone — except one that ended exactly at the end of a listing period (7 days, or a multiple of 30), which most likely just was not relisted — or a drop in Pinny Shop's stock, at that day's price.