This game will definitely sell well.
I'd say, if you put up the thousand yen bill for online auction, it would easily sell for five hundred yen.
I will teach you how to write novels that sell.
This word consists of kanji with hiragana attached. Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means sell, so the verb version is to sell or to be sold.
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You learned this reading already, so you should be able to read it! It's the same reading as 売る where you're trying to sell some Uni (う)!