A few years back I had a high end card, and I either consigned it to either probstein or PWCC (pretty sure it was probstein) and I got a far better proce for it.
Fees are reasonable too. I still ended up far in front.
But youd only do it for high end stuff because you have to ship it to them first
Both Probstein and PWCC get higher prices for high end cards. It's not really worth it unless they are over $100 each, due to the commission you'll pay. I've just finished a submission to PWCC and was very satisfied with the service as well.