Greens : at the increased rate of green drops these days after patch 2.0 last year, it's not really worth going up that much higher than the suggested WoW. exception to the rule are +healing gear at higher levels, especially plate items. those can sell with a higher increase with no problems.

Blues : Hard to tell. Some drop move often than others but generally 100g-800g at lvl 70? Depending on what drops. If it's a DPS caster stuff, those can go very very high.

Epics : Lvl 70, u sually maxed out at 1000g I think. Not sure if the AH can push it up higher than 1000g.

khorium might be pricey although if you're lucky, you might get a full khorium instance. that's what i had during an SL run.

don't do raids?

there's nothing like it though until you try it out, that is.

cheap primal fire. i wantttttttttttttttttttttttttttttttttttttttttttttttt......

damn, all are cheap to buy. lol!