Graded Card Price Guides

[snookerhall]

Hey everyone. I'm another one of those collectors just getting back into the hobby (about a 10 year hiatus). My question is - what do you guys use to get a gauge for how much others have valued a particular graded card you are looking at? Based upon board lurking it seems that cardtarget and VCP are the main ones but am wondering if there's something else I haven't unearthed.

I'm referring to online auction results. I have researched it a bit and here's what I've found:

ebay - only 3 months history
cardtarget - I can find only a handful of sets (but if you were going to pick vintage sets, I think they've nailed the most popular ones)
VCP - pretty comprehensive it seems
cardpricer - haven't read much about them.
sportscarddatabase.com - signed up but I got a message saying their price history is only available to their developers or some crap like that.
zistle - does not distinguish graded

Thanks.