This is invalid on multiple counts.

First, if 14 can't sell for 2 months, it should not be priced at 14 - it means 15 is an outlier and should not be factored into the range.

Second, the sale at 15 is probably not really 15 - you are basing values here on a 1 year old price. So you are updating a 1 year old here with another 1 year old hat. That's not gonna work. You'll need to make a mini on the blizz robo stove pipe to use that as proof here

14 might end up accurate here, but you'll need real support for it