After a bit of research last night i found a site that can help identify expected auction house values.... expected is a broad description as sometimes the values calculated are a bi steep. BUT, the site does offer some perspective as to the item's inherrent value, which in turn places a clear line on which to base your Auction House price
Click
here to see
Diablo 3Values.
Another
site that i have been using for a while is an
auction house price tracker. The site gives a clear view on the item's history and epected values. Mainly for Gems and Legendries. You are also able to track gold/$ prices.
The site is an absolute
gem, and i highly recommend to give either a try.
Radiant Star Amethyst
17,409,486 gold
9.78%
Helm: +18% Life
Weapon: Each Hit Adds +600 Life
Other: +58 Vitality
Item Level: 66
15,706,686 gold (2 days ago)
16,316,042 gold (3 days ago)
15,800,264 gold (4 days ago)