Question

How much would be the least to sell a Necro rune of Sup Soul reaping.
The rune trader offers 950, and it costs 1200 to buy off rune trader. Should I just sell to rune trader or try and get about 1100/1150 for it? How much do you think i would get??

Sup soul reaping is in fairly low demand, so for that little gold, just sell it to the trader. For most runes, your time is better spent doing something else - rune selling is really only worth it when you can make a couple k buying low and selling high.