As a former online retailer, I understand the frustration of rising fees, deadbet bidders, and stupid shipping fees. These are the exact reasons I got out of the business.

As an enthusiast who occasionally needs parts, it breaks my heart to see huge stores of original parts get scrapped for $100 a ton.

Certainly some things will rarely or never sell...Hubcaps, leaf springs, t-bars, scratched glass, dry rot rubber parts, nuts and bolts, so there are some places you could start pitching things out.

Your stuff, so you can do with it what you want. I'd hope you give it away before you would throw it away. But it does have value and it does take time from you to dig through and pull out stuff for piece meal sales/donation. I hope you find someone willing to take the whole lot of it.