Last one got declined/closed because of the numerous gifted ones. I searched the faqs and it said that if it was gifted, then it would count 25% less the original price. Lets see if this works again with a new range.

http://www.tf2outpost.com/trade/11309430

sold for 15 robo keys (15-18 keys) 16.5 keys median

http://www.tf2outpost.com/trade/11308064

sold for steaming Stanley steel toe (12-13 keys)Outlier

http://www.tf2outpost.com/trade/10951614

sold for 13 keys ??? 12-13.(Gifted) which means it is 16-17buds

http://www.tf2outpost.com/trade/11100607

Most likely sold for 17 keys

http://www.tf2outpost.com/trade/8676082

Offer of

Gold botkiller sticky mkii (3 keys) and 10 more keys total 13 keys

Orange BMOC + sweets. 13-14 keys

19 keys

White Bills (9.5 keys) and a strange festive sandvich( 6-6.5)=15.5-16keys

http://www.tf2outpost.com/trade/11257194

Offer of 14 and 15 keys (accepting) GIFTED meaning it is actually 18-19keys

http://www.tf2outpost.com/trade/11222445

sold for essential accessories (4 keys) + s sapper (6 keys) + 4 keys in sweets =14keys GIFTED meaning it is actually 18keys.

P.S. If this doesn't work, tell me.