Well, it's being sold on marketplace, so you have to use the marketplace value on keys - 2.10 - not 1.90. I'm not sure how I feel about using marketplace sellers do drop hat values. A lot of people cannot cash trade, so the buyer market is much more limited. However, it still means the seller is willing to sell at that price... IDK

Looks like it sold so this'll be valid to use, however as polar said you're going to need to use the price that marketplace sells their keys for, not the key paypal equivalent.

Resuggest this once you've fixed that.