I no longer deal in Vinyl - to be honest it was too much trouble.
Depends whether you urgently need the space or not. If you don't then Ebay is the way forward. Otherwise dealer. And it'll take ages!!
I'd recommend you look at http://gemm.com/ as a start to get some ideas of what is selling at what prices. I have always found this a bit clunky to be honest. Then start your record off on ebay at half the lowest price you can find depending on condition. Generally speaking they need to be really good to have a chance.
As JohnnyP says some of them do go for daft prices.
And congratulations - I never got around to doing mine and sold them to a dealer (the other route).
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sj