Sad but true. What I would do, cull through them looking for what are most likely the 20 or so of the very best. Look up those select few on discogs to make sure they are valuable. There are bound to be a few. Because while its true the vast majority aren't worth zip its also true some have actually gone up in value.
Then you have a choice. You can put the really valuable ones up on discogs and toss, donate, or Craigs list the rest. Or you can combine the good ones along with five or ten pretty good ones and offer the lot on eBay. This way people who know will be willing to pay more for the one that's actually worth something, on the chance they get some of the others are good too. I bought some in lots just like this one time. Pretty good deal for both parties.
Otherwise, if you try and dump them all at once, I can just about guarantee there's a few in there you would get more for selling just the one or two than anyone will pay for the whole pile. Doesn't sound logical but just try and see.
Then you have a choice. You can put the really valuable ones up on discogs and toss, donate, or Craigs list the rest. Or you can combine the good ones along with five or ten pretty good ones and offer the lot on eBay. This way people who know will be willing to pay more for the one that's actually worth something, on the chance they get some of the others are good too. I bought some in lots just like this one time. Pretty good deal for both parties.
Otherwise, if you try and dump them all at once, I can just about guarantee there's a few in there you would get more for selling just the one or two than anyone will pay for the whole pile. Doesn't sound logical but just try and see.