Amps what air max stuff are you looking at? And tell me more about the rare stuff sitting in your attic. My biggest win was a pair of maize yellow / black / white swoosh high top dunks from 2011, which I got for $70 at the time, and sold for $350, just before the in flux of dunks this year. Kid was ecstatic with his vintage dead stock pair. The second hand black cement 3s from 2018 which I beat for three years sold for cost price.
My friends tell me I should be ashamed of myself for hustling 18 year olds and my wife couldnt be happier.