Re-submitting, for reference:

"I don't like the idea of setting the price based on that unusual trade. (1) Looks like an outlier; (2) Milkman price is 4 months old; (3) trade was made 2 weeks ago. Price on the craftable version of these has changed a lot in 2 weeks and that is most assuredly going to have at least some affect on the uncraftable one.

Your seller for 15 sold for 7-8 in items, it seems: http://www.tf2outpost.com/trade/14051651 - which will require some overpay factored

I'd say this looks like a 6-7"

Strange Uncraftable Pomson 6000, 6-7 keys.

http://www.tf2outpost.com/trade/14047154 - Sold 2 for a Nuts Milkman (~16 keys), 8 keys

http://www.tf2outpost.com/trade/14051128 - Sold both for 15 keys each, outlier?

http://www.tf2outpost.com/trade/14414947 - "Quicksold for 6"

http://www.tf2outpost.com/trade/14419172 - Sold for 6 keys

http://www.tf2outpost.com/trade/14214801 - Offered 7 keys

http://www.tf2outpost.com/trade/14349146 - Offered in the trade above, traded a clean s. Pomson (~7 keys) for a dirty one.

http://www.tf2outpost.com/trade/14410345 - 10 keys, no offers.

http://www.tf2outpost.com/trade/14402634 - No notable offers.