I've been looking through a fair few private galleries of late. I only bother when they've got a ton of pics and they're pretty cheap (either using leftover cash from a webcam session, or freeviews). I wouldn't bother with the ones selling a dozen pics or so for a fiver or more.
I'd highly recommend Hayley:
External Link/Members Only or
External Link/Members Only+
2,000+ pics for 3 credits (over 3 days)
Tons of hardcore/gangbang images in high quality. Plenty of cocksucking, fucking and facial pics, along with close-up anal and pussy fucking. There's a few of her with an anal hook in her ass too.
I'll review some more if people find it helpful.