Lvl 60 clerics and chanters used to go for upwards of a grand, you may still be able to find some in that range.
www.playerauctions.com
My shammy is 53 but not worth much cause I'm on Tallon Zek (PvP Teams) and my thief is 52, not a super desirable class at high levels, unless you're 60 with a RB. The high level game is fun and those characters can get you into it for cheap without a year of playtime, but some people love the leveling at low-mid levels the best. I can tell you exactly where to hunt from level 1-50 if you want to take some of the mystery out of it.
C.