I decided that my recent suggestion of 2-3 keys was maybe a little too wide so how about we try again, hmm?

2 keys

http://www.tf2outpost.com/trade/8425989

http://www.tf2outpost.com/trade/7711374

http://www.tf2outpost.com/trade/3684836 - sold for 6.88 which is roughly 2 keys

http://www.tf2outpost.com/trade/8437157

2 keys 2 rec

http://www.tf2outpost.com/trade/5957197

2 key 1 ref

http://www.tf2outpost.com/trade/8370550

http://www.tf2outpost.com/trade/8386904

2 keys + 1.66

http://www.tf2outpost.com/trade/8402693

2 keys 2 ref

http://www.tf2outpost.com/trade/8007202

http://www.tf2outpost.com/trade/8339834

http://www.tf2outpost.com/trade/7584137

http://www.tf2outpost.com/trade/8396652

http://www.tf2outpost.com/trade/8386732

http://www.tf2outpost.com/trade/8384998

http://www.tf2outpost.com/trade/8422627 - recently sold even though owner wanted 3 keys

2 keys + 3 ref + 1 rec

http://www.tf2outpost.com/trade/2990647

Hopefully this will satisfy more people and be much more accurate. Thanks to all for suggestions on the last one!

Many, many people want to sell this at 3 keys. A few sell, yes. But 2 keys + metal is usually what sells the most and is most widely accepted.