Maybe I could counter.

http://www.tf2outpost.com/trade/23256340 ~ Sold for a Memory Leak Tartan Spartan = 2.6 * 0.9 = 2.3 buds

Mini for Spartan

http://www.tf2outpost.com/trade/22850233 ~ Sold for a Power Surge Crown = 2.9 * 0.9 = 2.6 buds

http://www.tf2outpost.com/trade/22972477 ~ Added 21 keys for a Peace Sign Modest = 3.3 buds at that time

Mini for Modest

http://www.tf2outpost.com/trade/23265895 ~ Sold for Poisoned Shadows Salty = 5.1 * 0.9 = 4.6 buds

3rd sale is taken from current active suggestion.

http://www.tf2outpost.com/trade/22371469 ~ Sold for DP Front Runner

Mini for Front Runner

http://www.tf2outpost.com/trade/22400272 ~ Sold for DBD Noble = 3.8 * 0.9 = 3.4 buds

Current owner wants 3.5 pure. First sale is an outlier. Feel free to counter or support my proofs.