I’ve made backlist novel titles and even a couple of original collections available on Amazon and Barnes & Noble as ebooks, and so am familiar with the deal and its numbers. You can set your own prices, but they can’t be lower than $2.99. That’s not a high price for a novelette, about the cost of two lousy beers or one good one in the store. And the writer gets 70%. Try to get a royalty rate like that with a traditional paperbound publisher!