Is there a goodwill outlet store near you?
They sell things by weight, they weigh your cart and heavy items are like 2 bucks.
You can find some really good items there, depending on how you sell items from the storage units.
You can spend 20 to 50 and get a lot of good items for resale.
There are people there that are buying items to sale at flea market or to take to Mexico to sell.
I have bought some high quality like new hand crafted Persian rugs worth 1100 and paid 4 bucks.
Also have found lots of other really good items and artwork.
They usually charge 2 bucks for paintings, art.
Depends on where you live, but i imagine their pricing is similar nationwide.
They also have cheap priced furniture. You can buy them cheap, fix them up or re paint and then sell.
https://www.dailymail.co.uk/news/article-9257395/Pentagon-admits-testing-wreckage-UFO-crashes.html