audiophile records appraiser


I have a dozen rare audiophile Lps mostly sealed sheffield lab lps that i would to like to be appraised.
Awhile back a professional appraiser connected with Ebay appraised one of my record but Ebay stopped offering this function.
I would like to put my collection up for auction but do not know how to price my items.
Please help
stelladesign
Thank you fellow goners for the quick replies.
Special Thank you to Vinylmeister and Mt10425 for pointing me to two great sites.
Some of my audiophile records are posted on my Blog at: file:///Users/claudepierrelouis/Desktop/GALLERY/Promotiff_IWEB/Promotif/Promotif/Promotif/AUDIOPHILIAC/AUDIOPHILIAC.html

The hardest part of the whole affair is deciding what to get rid of.
i will be updating the Blog monthly.
stella

Aside from my joke above, please let me know if you have an original, first edition, unopened Discover Again and I will gladly consider paying whatever top dollar the appraiser suggests.