I believe that you believe your analysis to be correct.
So why not use the salvage that you bought as collateral for a loan to buy even more salvage?
(I know, you wish you’d had this idea before you wrote your post. But that doesn’t mean that it’s too late now. Salvage prices have mostly been stable; you could still multiply your profit.)
I happen to be offering collateralized loans. Feel free to contact me if you want to discuss the details.