I'd go for Audiogon, break it up into small sets.
For the real rarities like the UHQRs (which can fetch big time money) I'd make it known that you have them, PM some interested/well known Head-Fi Members, then Put it up on Audiogon, by itself.
Selling LPs is all about the "T L P"
T= Timing. You have to hit the market at the right time. People will buy music that they've been looking for, or have had a recent interest in.
L= Location. You've got to pick your spots. Selling a Ferrari in your rural front yard probably won't help you much, but contacting the right people and listing it in a respectful organization will get it sold.
P= Product. It looks like you've gt that covered. People will want what you've got.
Good luck, and don't let yourself be low-balled. Check out some of the "going rates" for the high-end stuff like the UHQRs.
HTH
NK