1.5 still possible, 2 keys is also possible.

Sales / Offers / Adds

http://puu.sh/4QIBd.png 2 keys

http://puu.sh/4QICm.png 2 keys (eyelander sold for 2 ref)

http://www.tf2outpost.com/trade/15127293 1.7 sold

http://www.tf2outpost.com/trade/15052308 1.9 sold

http://www.tf2outpost.com/trade/15090462 2 keys sold

http://www.tf2outpost.com/trade/15117663 2 keys sold

http://www.tf2outpost.com/trade/15012341 2 keys sold

http://www.tf2outpost.com/trade/15093049 2 keys sold, not in bp

http://www.tf2outpost.com/trade/15108866 2 keys sold (id is diff than one in bp, page 20)

http://www.tf2outpost.com/trade/14903621 2 keys sold (id is diff than one in bp, page 17-18) and has an add for 2 keys

http://www.tf2outpost.com/trade/14548097 2 keys sold plenty

http://www.tf2outpost.com/trade/15089431 2 keys sold http://puu.sh/4UUr9.png

http://www.tf2outpost.com/trade/15067209 2 keys sold http://puu.sh/4SB3Y.png

http://www.tf2outpost.com/trade/14828865 2 keys add

http://www.tf2outpost.com/trade/15016971 s. screen + 1 key sold for s. teddy (~2 keys)

Extra / counter proof is always welcome. Sorry for any duplicate / invalid links.