just recently sold one of these and 3.5 is definitely too low, tempted to put it higher but all the higher offers are unusual not pure

Proof

[url]http://www.tf2outpost.com/trade/9013176[/url] trading sunbeams fez for downgrade (6.8-8), accepted offer for P.E fez + 2 buds (5.5-6 on current price) but yet to trade

[url]http://www.tf2outpost.com/trade/9228716[/url] offer of P.E charmers (5.8-6.8) for fez + 2 buds

[url]http://www.tf2outpost.com/trade/8163072[/url] been up for a month good offers include. headcase + 1 bud, and burning flames inspector (3.8-4.5)

my trade: [url]http://www.tf2outpost.com/trade/9294970[/url] sold for P.E drills in less than 1 day (4.2-4.6)

also offered on this trade [url]http://www.tf2outpost.com/trade/9238347[/url] to downgrade my fez for oribiting fire fez+2buds+20 keys (≅4-4.6) but took the drill instead