Here's a very specific question (obviously situational, but I'm curious about the general philosophy people have):
You have a six minion board. You buy a buff minion (say, Defender of Argus) with your last 3 gold and slam it down. Do you leave it there for the sake of having an extra body (just a 2/3 at this point), or do you sell it to cycle through the tavern and look for something to freeze for your next round?
There's no point in selling it right away, You get slightly more stats for the next fight and if you do sell it and reroll you'll have to freeze the board instead of getting a free reroll next turn. It's more beneficial to leave a weak temporary minion on the board and sell it next turn.