small drop

Sellers at outpost for 4 keys:

[url]http://www.tf2outpost.com/trade/21047671[/url] - 2 days (also for 4 keys in the bp.tf classifieds)

Sellers at outpost for 5 keys:

[url]http://www.tf2outpost.com/trade/21111465[/url] - young

[url]http://www.tf2outpost.com/trade/20598538[/url] - 2 weeks

Conclusion:

4 keys should be in the range because it also needs time to sell it for 4 keys -> no QS. Further c. third degrees have killstreak.

Supportive proof, counter proof and interesting comments are always welcome