It's obviously a terrible idea now, but I reckon we should have definitely chucked £10m at Palace the season we came back up instead of £20m on Wesley. He wasn't that important to them and left on a free the following season.
Some players just fit a club - and even at 30, Benteke, with Grealish, McGinn, Mings et al, with a back-in-the-Premier--League Villa Park instead of Palace's mob fully behind him - I reckon it would have just worked.