Sellers:

http://www.tf2outpost.com/trade/28144214 - 4 Keys (Pink Paint) - 6 Days (Unbumped)

http://www.tf2outpost.com/trade/28163544 - 4 Keys (Gold Paint) - Young

http://www.tf2outpost.com/trade/28095274 - 3 Keys 16 Ref - >3 Weeks (Unbumped for 5 Days)

http://www.tf2outpost.com/trade/28160817 - 3 Keys 9 Ref - 1 Day

http://www.tf2outpost.com/trade/28150362 - 3 Keys 7 Ref - 5 Days

http://www.tf2outpost.com/trade/28159217 - '2 scrap less than bp.tf' - 1 Day

Classifieds:

http://imgur.com/a/fe18H

x1 3 Keys 7 Ref

x1 3 Keys 7.66 Ref

x1 3 Keys 9 Ref

x1 3 Keys 13.33 Ref (15 Days unsold)

x1 3 Keys 14 Ref

x1 3 Keys 14.77 Ref

x1 4 Keys (Gold Paint - 12 Days unsold)

SCM supports the drop with most recent sales around ~$7.5 (~3 Keys)

Conclusion:

Seller unsold for 5 Days at 3 Keys 7 Ref (~3.4) with various unsolds above, up to 2 weeks, taking a flat range of 3.4 Keys