Ok…been out of the scene for several years.
Looking for a good rune worth comparison site.
Basically, im struggling in A1 Hell with my Tesladin, and really in need of UM. On my wishlist that may help is Crescent Moon preferably because im still using Butchers Pupil trash (or any good armor/shiel with res better than Vipermagi and Spirit).
Have a few trashy items like Bartucs, Bloodletter…and trying to get an idea on worth while farming NM Meph.
Any helpers out there?
You will probably have a better time in the Trade forums: https://us.forums.blizzard.com/en/d2r/c/trade/8
Some people arent gonna wanna hear this, but the most consistent place to determine value is d2jsp. items get valued and shipped 24/7. its d2 amazon for all intents and purposes
now by default, the value is presented in terms of thier currency. however, you could extrapolate that worth unto other items going for a similar price.
now dependent on your… moral compass, you do not have to participate in FG trades, but simply use the site as a price guide. do some searches and comparisons and you’ll find the mean value of an item. using search will require an account. some people do use that site just due to accessibility and do not even accept FG.
other avenues: the forum as posted above, diablo2 io (but there is NO hardcore trading there as far as i can tell) various discord channels.
really at the end of the day it comes down to what its worth to you vs what someone is willing to pay. in these early weeks things will be pricier. that same trend will continue when ladder launches and each subsequent reset
Managed to get my UM. Not sure if the trade was equal value or not lol (mid res vipermagi) but…I have what I need for Crescent Moon now, so a better weapon for my Tesla 
You traded an item you didn’t want for an item you did want.
Sounds like a fair trade to me.
Indeed, thats what counts at the end of the day.