Japan's hardcore minimalists, who have sold most of their possessions

I want to sell my records (and some other stuff) but I want to at least attempt to break even. some of it is pretty collectible, but even if most of them are only worth a couple bucks plus shipping, we’re still talking hundreds of hours of data entry, packing, and post-office-ing. I’m prepared to take a hit on my time but combined with learning how to ebay, how to fairly grade the records, build and maintain a reputation, getting all the shipping materials; it’s fairly daunting to get started.