I use Net54 a lot. On graded cards, I try to price them slightly lower than VCP (just depends on the card) considering I'm not having to pay any eBay fees or deal with irrational buyers.
Collecting 1965 Topps High #'s SGC 88 or better: 10/91
BUYING Well Centered:
1956 Topps SGC 84 or Better (or raw equivalent)
1965 Topps SGC 88 or Better (or raw equivalent)