Classical LP & CD Collection - How do You Sell When Record Stores Don't Want?


I have 250+ classical LPs many in M- condition for the vinyl and 300+ classical CDs that I want to start selling off. I recently brought a box of them to a record store and the owner just said "I can't sell this stuff!". Do you have any suggestions? I was thinking of offering in specific groupings all the Argo, Deutsche Grammophon, RCA etc. etc. I'm not trying to make top dollar on anything just the collection has gotten large and something has to go.
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Yes I know those but would prefer to sell the entire lot and either deliver or have it picked up. Piecemeal on these sites would take me forever. Any suggestions on record stores that take classical in the Northeast?
I know that Mystery Train in Gloucester Ma has a large classical section so they may be worth a call. Great used music store with every category of music you could want and a nice area to visit.(this maybe a tough time to sell as many of these stores have been closed and I'm sure their income is way down)
I use Craigslist successfully for large lots like that.
Sure you might have to deal with ten idiots or more before you find a buyer but to move all at once not too many other options.

I have sold large lots of CD (300+), vinyl (80+) and even cassette tapes (50+) this way.

And it's free so not too much to lose really.
Good luck.
The record store owner was telling you the truth, there is virtually no market for classical lp recordings.  Notice he didn't even offer you ten cents per record?  No market at all for opera lp's. Not easy to even give them away, but you can try.