By far, this item is just rare -- not really worth what it is, in my opinion.

Classifieds

At the moment there are only so many on here:

http://backpack.tf/classifieds/search/id/5206033fba25362d0b00001e

Buyouts of 2 keys have either just not been removed or they have not been sold. Some trades are several days old.

Before we even get to outpost, I talked to someone with a B/O of 2 keys here -- http://puu.sh/5tfzX.png

They have been offered a key for it, though I don't believe this trader had any thought of taking it.

Unsold Outpost Trades

2 keys or more

http://www.tf2outpost.com/trade/15961204 - 3 hours

http://www.tf2outpost.com/trade/15893666 - 2 days

http://www.tf2outpost.com/trade/15894400 - 2 days

http://www.tf2outpost.com/trade/15880489 - 3 days

http://www.tf2outpost.com/trade/15861500 - 4 days

http://www.tf2outpost.com/trade/15851317 - 4 days

http://www.tf2outpost.com/trade/15858091 - 4 days

http://www.tf2outpost.com/trade/15848496 - 5 days

http://www.tf2outpost.com/trade/15705424 - 1 week

http://www.tf2outpost.com/trade/15640333 - 2 weeks

http://www.tf2outpost.com/trade/15642316 - 2 weeks

http://www.tf2outpost.com/trade/15529875 - 2 weeks

http://www.tf2outpost.com/trade/15662329 - 2 weeks

http://www.tf2outpost.com/trade/15534502 - 2 weeks

http://www.tf2outpost.com/trade/15589617 - 2 weeks

http://www.tf2outpost.com/trade/15430178 - 3 weeks

http://www.tf2outpost.com/trade/14676387 - 1 month

<2 keys

http://www.tf2outpost.com/trade/15916668 - 1 day. 1 key + 2 ref

http://www.tf2outpost.com/trade/15930331 - 1 day. 1.6 keys

http://www.tf2outpost.com/trade/15887116 - 2 days. 1.5 keys

http://www.tf2outpost.com/trade/15858894 - 4 days. 1 key + 5 ref

http://www.tf2outpost.com/trade/15826390 - 6 days. 1.4 keys

http://www.tf2outpost.com/trade/15794675 - 1 week. 1.5 keys

Others

http://www.tf2outpost.com/trade/15648667 - 2 weeks. 0 offers.

http://www.tf2outpost.com/trade/5781831 - 1 whole year or more. Unsold. No good offers, not even a post within 3 months.

http://www.tf2outpost.com/trade/15876610 - closed, from someone else above asking 1 key + 2 ref. Looks like he could not sell at 2 and dropped it lower.

Sold

A precursor - most of these on outpost have been found from the recent Halloween event instead of bought, so there are plenty more open trades than solds

http://www.tf2outpost.com/trade/15572175 - 1 key (open and closed 2 weeks ago, QS)

http://www.tf2outpost.com/trade/15393546 - 1.5 keys. Offered and the owner was willing to sell for that though the buyer's name isn't in the history.

http://www.tf2outpost.com/trade/15826554 - I am not sure as to what this sold for. It is plausible that it was sold at 1 key + 4.66 (asking price) but I can't be certain.

http://www.tf2outpost.com/trade/15401710 - Offered 1.5 keys (again)

I bought one at 3 ref, very low QS price - http://puu.sh/5tiiR.png

tl;dr: People have been offered 1.5 keys. Buyouts of 2 keys have not been met according to my research, and is nearly impossible to get. Anything lower than 1.5 keys isn't exactly swooped up right away as people still don't really want this part.

I understand this proof isn't exactly top notch, though I did spend a good amount of time compiling it and I don't see anything against it lying around. I will always appreciate counter-proof or more proof of a good suggestion. I am having a hard time selling it myself, I do own one.