How many items should I have in my auction?

We see successful auctions of all sizes. There’s probably a sweet spot between 30 and 70 items, but we’ve seen very successful auctions with less and with more. The key is being able to categorize the items neatly so that it feels like a manageable experience for the bidder. We’d caution against auctions with hundreds and hundreds of items, as sometimes items can get less attention than they deserve!