2 recent sales, time for a price.

*Adjusting the low end with unsolds and sales for the dead prez lucky shot.*

First Sale - Sold for a Dead President's Lucky Shot (~15.5) + Strange Pro Killstreak Original (~12) * .9 = ~24.75 keys, rounding to 25

Trade Link - http://www.tf2outpost.com/trade/27555973

Buyers Backpack Before - http://backpack.tf/profiles/76561198117471384?time=1449648000

Buyers Backpack After - http://backpack.tf/profiles/76561198117471384?time=1450425600

Sellers Backpack After - http://backpack.tf/profiles/76561198014664814?time=1449993600

Second Sale - Sold for a Purple Energy Shooter's Sola Topi (~31) + a Genuine Double Cross Comm (~3.5) * .9 = 31 keys

Trade Link - http://www.tf2outpost.com/trade/27577276

Buyers Backpack Before - http://backpack.tf/profiles/76561198148613804?time=1450857600

Buyers Backpack After - http://backpack.tf/profiles/76561198148613804?time=1451203200

Sellers Backpack After - http://backpack.tf/profiles/76561198117471384?time=1451289600

Current Seller - http://www.tf2outpost.com/trade/27623116

Dead President's Lucky Shot - Outdated 5 month price

Unsold at 16 in classifieds - http://backpack.tf/stats/Unusual/Lucky%20Shot/Tradable/Craftable/60

Same seller has it also for 17 keys unsold for 1 month on Outpost - http://www.tf2outpost.com/trade/27490598

Selling for 15 keys - http://www.tf2outpost.com/trade/27638151

Unsold for 3 weeks - http://www.tf2outpost.com/trade/27562464

See anything else to add to the suggestion, let me know.