Okay. I wanted to avoid using them as I new someone would say Oi Lemons it's in date. I did it with a Crone's dome recently that was like 190 Keys and there was a 1 month seller @ 180 and lots of people complained.

The seller @ 14 quickbought through their buy order @ 12

Sales:

http://backpack.tf/profiles/76561198134054821#!/compare/1488412800/1488585600 - Spec KS Batsaber - Countered by buyer - That;s why Jarool is selling low.

http://backpack.tf/profiles/76561198134054821#!/compare/1486684800/1486857600 - Sold with a key for a Orbiting Fire Texas Tin-Gallon (Recently done @ 18) = 17 Keys

http://backpack.tf/profiles/76561198150077063#!/compare/1484611200/1484697600 - sold for a Duped Purple Confetti Berliner's Bucket Helm + 4 Keys = 16

Mini for the helm -

http://backpack.tf/profiles/76561198150077063#!/compare/1484697600/1484956800 - 12 - countered by buyer

http://backpack.tf/profiles/76561198334198375#!/compare/1488585600/1488672000 - low countered by buyer

http://backpack.tf/profiles/76561198334198375#!/compare/1488326400/1488585600 - sold for a Stormy Storm Airdog (18)

http://backpack.tf/profiles/76561198135268403#!/compare/1484611200/1484697600 - Unusual doesn't match. The 3 keys do?

http://backpack.tf/profiles/76561198135268403#!/compare/1484524800/1484611200 - Don't match again

http://backpack.tf/profiles/76561198272871035#!/compare/1484438400/1484611200 - Sold with ~2 Keys for a Kill-a-Watt Napper's Respite (18)

http://backpack.tf/profiles/76561198272871035#!/compare/1484092800/1484438400 - Sold for Bliz Storm Beanie (15) + ~2 Keys = 17

http://backpack.tf/profiles/76561198152443397#!/compare/1486252800/1486684800 - Low countered by buyer

http://backpack.tf/profiles/76561198152443397#!/compare/1469491200/1483574400 - SCM

So there is some proof for 18 and high 17's and some proof that counters the cheapest sellers as they bought cheaply.