Any proof....?

I bought mine for 24 keys

http://www.tf2outpost.com/trade/3924676

I used the pricing here for my original offer. It didn't go over well but it got me started.

Only 2 on the market currently.

No seller will sell at 20 keys. The adjustment is small. Ok to stay where its at or bump a small amount.

IMO Smoking & Steaming are really the same effect just in different shades.

Agreed with Irish. Current price pretty much includes 1 bud and there's no evidence of anything getting offers of higher while we just have proof of one going for a bit lower. Always better for unusuals to have a range anyhow, there's a reason the site automatically put on ranges back when you could only suggest a single price. I think it's better to leave things as is.