http://www.reddit.com/r/tf2trade/comments/1bu6bo/h_unusual_triboniophorus_tyrannus_steaming_w_2830/

asking 28-30 keys

http://www.tf2outpost.com/trade/9745220

1.33 added to discuss, guy bought one

1 bud 2 keys, rejected, guy claims to have bought one for that, and certainly has one in his bp

the guy who bought one from link 2: http://www.tf2outpost.com/trade/9840213

claims to have a c/o of planets hottie's with halloween paint ~1.1-1.2

http://www.tf2outpost.com/trade/9811665

b/o is 1 bud 11 keys

also offered the hottie's, no response

http://www.tf2outpost.com/trade/8577600

nuts slug + six keys + sweets, rejected

http://www.tf2outpost.com/trade/7572158

1.33, added to discuss

vivid plasma football helm(23), rejected

asked to add 2 pure for a planets slug, rejected.

A conservative drop seeing as most people are interested in 1.33 ish but try for more. low end comes from the asking price from reddit (looks like he's willing to take 28). I had this hat about 4 months ago and can tell you from personal experience the effect is a hard sell, but people still like the slug.