Counter to include more of the recent sales

Edit: Not sure how necessary this suggestion is now that bone dome closed, as it's pretty close in range to the currently accepted suggest. Took ages and has a lot more sales though so I guess I'll leave it up for now?

Sale 1

Sold for 80 keys, stormy 13th l'inspecteur (30) and pro aussie frontier justice (14-17) = ((30 + 15.5) * 0.9) + 80 = 121 keys

http://www.tf2outpost.com/trade/25350665

Buyer before: http://backpack.tf/profiles/76561198080575862?time=1426575600 (March 17th)

Buyer after: http://backpack.tf/profiles/76561198080575862?time=1426662000 (March 18th)

Sale 2

Sold for 80 keys pure

http://www.tf2outpost.com/trade/25328205 quicksold

Buyer before: http://backpack.tf/profiles/76561198101827162?time=1425884400 (March 9th)

Buyer after: http://backpack.tf/profiles/76561198101827162?time=1425970800 (March 10th)

Sale 3

Sold/offered with 17 buds (11), a max's (37) and ~8 keys in sweets for duped haunted ghost antlers (697-744) = 720.5 - (17 * 11) - 37 - 8 = 489 keys- outlier, probably due to outdated/hard to price inflated hats

Seller before: http://backpack.tf/profiles/76561198027902188?time=1425715200 (March 7th)

Seller after: http://backpack.tf/profiles/76561198027902188?time=1428130800 (April 4th)

Buyer before: http://backpack.tf/profiles/76561198049158906?time=1425884400 (March 9th)

Buyer after: http://backpack.tf/profiles/76561198049158906?time=1425970800 (March 10th)

Sale 4

Sold for 13 buds (10) pure = 130 keys

http://www.tf2outpost.com/trade/25341483

Seller before: http://backpack.tf/profiles/76561198151151295?time=1426575600 (March 17th)

Seller after: http://backpack.tf/profiles/76561198151151295?time=1426834800 (March 20th)

Sale 5

Sold for scorching magistrate's mullet (37-42) and duped burning party phantom (85) = (39.5 + 85) * 0.9 = 112 keys

Seller before: http://backpack.tf/profiles/76561198152898539?time=1425970800 (March 10th)

Seller after: http://backpack.tf/profiles/76561198152898539?time=1426057200 (March 11th)

Sale 6

Sold for duped beams conjurer's cowl (101), spec aussie grenade launcher (21-25), spec aussie sticky launcher (16-19), max's head (38-40) and 1 key = ((101 + 23 + 17.5) * 0.9) + 39 + 1 = 167 keys

Buyer before: http://backpack.tf/profiles/76561198152898539?time=1425283200 (March 2nd)

Buyer after: http://backpack.tf/profiles/76561198152898539?time=1425369600 (March 3rd)

Sale 7

Sold for kill-a-watt viewfinder (85-90), pe engineer's cap (31) and demonflame napper's respite (67) = (87.5 + 31 + 67) * 0.9 = 167 keys

Seller before: http://backpack.tf/profiles/76561197972404012?time=1430377200 (April 30th)

Seller after: http://backpack.tf/profiles/76561197972404012?time=1430463600 (May 1st)

Sale 8

Sold for blizzardy viewfinder (128) = 128 * 0.9 = 115 keys

Buyer before: http://backpack.tf/profiles/76561197972404012?time=1428390000 (April 7th)

Buyer after: http://backpack.tf/profiles/76561197972404012?time=1428476400 (April 8th)

Sale 9

Sold for 106 keys pure

http://www.tf2outpost.com/trade/25389617

Sale 10

Sold for g fetti brotherhood of arms (132-168) and 34 keys = (150 * 0.9) + 34) = 169 keys

http://www.tf2outpost.com/trade/25260939 offered 18 but 34 were traded

Seller before: http://backpack.tf/profiles/76561198084130751?time=1425970800 (March 10th)

Seller after: http://backpack.tf/profiles/76561198084130751?time=1426402800 (March 15th)

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Minis

Mini for stormy 13th hour l'inspecteur:

Sold for dbd detective noir

Noir BO was 30 keys

http://www.tf2outpost.com/trade/25760361

Seller before: http://backpack.tf/profiles/76561198045723643?time=1429426800 (April 19th)

Seller after: http://backpack.tf/profiles/76561198045723643?time=1429599600 (April 21st)

Mini for pro aussie frontier justice:

Average buyer pays ~$40

Average seller receives ~$34

Scm key price ~$2.40

40/2.40 = 17 keys

34/2.40 = 14 keys

Range = 14-17 keys

Mini for duped ghost antlers:

http://backpack.tf/item/3570686426 No other sales of the dupe and the only clean recent sale is complex/involves a lot of outdated hats too, so going to just use current price here = 697-744 keys

Mini for duped burning party phantom:

Sold for 85 keys

Seller before: http://backpack.tf/profiles/76561198047706237?time=1428303600 (April 6th)

Seller after: http://backpack.tf/profiles/76561198047706237?time=1428390000 (April 7th)

Mini for duped beams cowl:

Sold/offered with c9 surgeon's stahlhelm (42-45), and ~7 keys in sweets for houwar (144-156) = 151 - 43.5 - 7 = 101 keys

Seller before: http://backpack.tf/profiles/76561197973029544?time=1428303600 (April 6th)

Seller after: http://backpack.tf/profiles/76561197973029544?time=1428390000 (April 7th)

Mini for spec aussie grenade launcher:

Average buyer pays ~$60

Average seller receives ~$51

Scm key price ~$2.40

60/2.40 = 25 keys

51/2.40 = 21 keys

Range = 21-25 keys

Mini for spec aussie sticky launcher:

Average buyer pays ~$45

Average seller receives ~$38.25

Scm key price ~$2.40

45/2.40 = 19 keys

38.25/2.40 = 16 keys

Range = 16-19 keys

Mini for blizzardy viewfinder:

Sold for aces antlers (80-85) and 4.5 buds (12) = (82.5 * 0.9) + (4..5 * 12) = 128 keys

http://www.tf2outpost.com/trade/25071515

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Sales at 80, 106, 112, 115, 121, 130, 167, 167, 169, 489

The sale at 80 had a BO of 10 buds when buds were 11 keys, and quicksold for 80. The sale at 489 is an obvious outlier, probably caused by inflated hat prices I couldn't find decent minis for. Discounting those two gives a good range with plenty of sales at both ends and some in-between. I know it's a big range but there are a lot of sales and they're pretty evenly spread. Rounding to 105-170.

Feedback very welcome.