The uncraftable and craftable one are currently listed at the same price, I've done some research and u can't find them below 1.55 (found 1 selling for that), other than that mostly 2.00 and above.

I just sold one for 1 Key (that took a while though so that's not representative)

Sold/Offers declined:

http://imgur.com/HXKssXz (sold for 1 Key)

http://www.tf2outpost.com/trade/3853024 (sold one for 3.66, very old trade)

http://www.tf2outpost.com/trade/7628582 (2.33 Ref each, sold 1 apparently, hard to track since it's Pink Taco and he constantly buys and sells stuff)

http://www.tf2outpost.com/trade/8261866 (no price, declined 2 Ref yesterday)

http://www.tf2outpost.com/trade/8124126 (no price, declined 1.66 yesterday)

Unsuccessful Quickbuyer:

http://www.tf2outpost.com/trade/7133358 (quickbuyer at 1.33, no luck judging from the trade and his past trades, hasn't sold one in 1 month despite claiming he bought lots for that price - also it's quite uncommon to see quickbuyers at the low range of a price, they usually try to get them below that)

Sellers:

http://www.tf2outpost.com/trade/8280070 (1.55, no taker yet, added recently and no donator though)

http://www.tf2outpost.com/trade/8292160 (1.66, no taker yet, added recently and no donator though)

http://www.tf2outpost.com/trade/8294452 (1.66, fairly new, no taker)

http://www.tf2outpost.com/trade/8248141 (1.66, no taker)

http://www.tf2outpost.com/trade/8175520 (1.88, 2nd cheapest I found, no taker, small-time trader tho)

http://www.tf2outpost.com/trade/8236241 (2 Ref, unsold)

http://www.tf2outpost.com/trade/8298215 (2 Ref, unsold)

http://www.tf2outpost.com/trade/8289953 (2 Ref, unsold)

http://www.tf2outpost.com/trade/8196412 (2 Ref, unsold)

http://www.tf2outpost.com/trade/8080528 (2 Ref, unsold)

http://www.tf2outpost.com/trade/8191313 (2 Ref, unsold)

http://www.tf2outpost.com/trade/7647074 (2.11 Ref, unsold)

http://www.tf2outpost.com/trade/8033571 (2.33 Ref, unsold)

http://www.tf2outpost.com/trade/6893346 (2.66 Ref, unsold)

http://www.tf2outpost.com/trade/8283258 (1 Key, unsold)

http://www.tf2outpost.com/trade/8240003 (1 Key, unsold)

I could post a lot more 2 Ref sellers without any takers, but I don't see much point in that, it seems to be the most common price around. Please chip in if you have sold or bought one recently to add to my recent sale/declined offers list. Other than that there's not a lot of solid proof as outpost only lists unsold items, and most Spyers that are on the market aren't deleted, but there are no sellers who are willing to go below 1.55, most people list these at 1 Key (like me) or 2 Ref, only 4 links that sell below 2 Ref.

Any and all helpful comments are welcome.