Where to sell baseball autograph collection

I am going to get some of my collection authenticated. And I will probably start selling and downsizing. In addition to signed balls, cards, magazines, there are other items such as Hall of Fame bats with multiple signatures, a Topps card book from 1987 with many signatures, felt pennants signed, etc.
Just wondering other than ebay, where are other options? Or should I contact a large company?
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Comments
how about the Buy, Sell, Trade Forums here?
IMF
I’ve used Heritage Auctions to sell autographs and game used memorabilia in the past. They have a PSA rep on-site so you can save on authentication fees - they’ll be noted in the auction as pre-certified, so the buyer gets the guarantee and can get them slabbed after purchase. You can negotiate their seller fees so you get a bigger cut - they’ll probably be more generous if you have items in bulk or high end autos.
Jim