I think I found the epitome of overpriced third gens.

Sold for an Anti-Freeze Hotrod(86 Keys with Overpay, Outlier)

http://backpack.tf/profiles/76561198130809641?time=1428519499 -> http://backpack.tf/profiles/76561198130809641?time=1428562800

Sold for a Searing Plasma Pyromancer's Mask(65 Keys with Overpay)(B/O was 60)

http://backpack.tf/profiles/76561198041708708?time=1423987200 -> http://backpack.tf/profiles/76561198041708708?time=1424073600

http://www.tf2outpost.com/trade/24980818

Sold for an Orbiting Planets Pyromancer's Mask(28 Keys with Overpay) and 2 Buds(25 Keys at the time)(53 Keys total)(B/O was 50, Outlier)

http://backpack.tf/profiles/76561198044442899?time=1423190843 -> http://backpack.tf/profiles/76561198044442899?time=1423209600

http://www.tf2outpost.com/trade/24892300

Sold for a Purple Energy Barnstormer(49.5 Keys with Overpay) and an Australium Spec KS Wrench(~23.5 Keys with Overpay at the time)(73 Keys total)

http://backpack.tf/profiles/76561198133562608?time=1426107185 -> http://backpack.tf/profiles/76561198133562608?time=1426230000

http://www.tf2outpost.com/trade/25124948

Searing Plasma Pyromancer's Mask mini suggestion

Sold for 6 Buds(72 Keys at the time)

http://backpack.tf/profiles/76561197995912688?time=1424851011 -> http://backpack.tf/profiles/76561197995912688?time=1425456000

http://www.tf2outpost.com/trade/24554059

Using 72.

50 Seems low, for the reasons that it sold within a day and that it's already pretty old.

86 Seems high because of the constant B/Os that have been below it.

60-73 should be fine.

Additional Proof/Counter-Proof/Constructive Criticism/Feedback is always appreciated.