#2 Steam community market. Moderators always take a look at SCM values of all marketable items and consider them in any suggestion. If an item is selling regularly at 1 key on market and you have a single trade at 2 keys, more than likely your trade will end up an outlier if we wait for further sales. This doesn't mean that you should use SCM as the only proof to define your range, but particularly on rare items with few sales, mods always factor in SCM values to help identify outliers and common trade points. For unpriced items, we will consider SCM sales alone as proof only on items >10 keys in value.

From the rules.