For those who know me you may recall I would take my "day job wages" and buy cars one day a week at my local police impound auction and sell them in the newspaper for 2-5 times my paying price within a week.
So for the past 6+ years I have been watching this guys YouTube channel that basically does the same thing I did but with storage units...and he is a smart customer.
If your selling on Amazon,EBAY or the like pay attention to what he has to say...
https://www.youtube.com/watch?v=-ET-WTwU9PQ