Needs a price. raZ MG was fine with me countering so here it goes.

New price: 40 keys

[proof below]

SALE #1 = 40 keys

http://backpack.tf/profiles/76561198301125942#!/compare/1488240000/1488326400

Sold for a Cloudy Moon Heavy Duty Rag (40) + 2 keys

Mini for the Heavy Duty Rag = 40 keys

http://backpack.tf/profiles/76561198301125942#!/compare/1488153600/1488240000

http://www.tf2outpost.com/trade/28807168 reseller had a B/O of 38

I have Sprekt on my friend list so I was able to get any confirmation on what his B/O was. It was 40 keys. (on your mini)

http://imgur.com/a/2R2f0

http://backpack.tf/stats/Unusual/Heavy%20Duty%20Rag/Tradable/Craftable/38

Currently 1 seller at 39 keys.

So your C. Moon Duty Rag should be 38-40 keys here.

More sales on the Cloudy Moon Duty Rag

http://backpack.tf/profiles/76561198009272632#!/compare/1488499200/1488585600

Sold for 34 keys (quick sale) - invalid

http://backpack.tf/profiles/76561198119164169#!/compare/1488672000/1488844800

Sold for 32 keys (quick sale) - invalid

With the 2 quick sales, 1 seller below current price and 2 lower B/O's, I think it's fair to say that the Cloudy Moon Rag is not 45 but rather 38-40 keys.

SALE #2 = invalid

http://backpack.tf/profiles/76561198091126469#!/compare/1488240000/1488326400

Big outlier.

SUMMARY

Sales: 40

Sellers: -

Looks like the current owner is not reselling. Going with 40 keys here.