Ehh... it's been a while... I guess I'll just do it?

Classifieds: http://backpack.tf/stats/Collector's/Sticky%20Jumper/Tradable/Craftable

1x 16

1x 17

1x 18

Sellers:

http://www.tf2outpost.com/trade/22677255 - 15

http://www.tf2outpost.com/trade/22696519 - 16 (both have never been bumped, but if people wanna buy a c. sticky jumper, they'd see this trade so... dunno if this is a huge factor)

No unsolds at 17 - 19 (no one is selling for that much)

Only unsold:

http://www.tf2outpost.com/trade/22245761 - 20

Solds:

http://www.tf2outpost.com/trade/22497676#latest

http://i.imgur.com/47VgNA8.png?1 - 15

http://www.tf2outpost.com/trade/22585172 - 16?

There, going for 15 - 16 as per polar's req.