Gotta keep it current. Volt-age can cause a price to become outdated.

Revisiting to include sales on the duped Glengarry Bonnet, as suggested by Marty Birdman and ĔлigмД.t✖t.

The results were shocking and the effort was negatively disproportionate to the effect.

Sale #1: Pure Sale — sold for 16 Keys pure

• (Overview) http://imgur.com/ThETVCn
• (Effect) http://imgur.com/1aq03NR

Inventory of seller before: http://backpack.tf/profiles/76561198095335435?time=1441782000 (September 9th)

Inventory of seller after: http://backpack.tf/profiles/76561198095335435?time=1441868400 (September 10th)

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Sale #2: Complex Sale — TaW Bonnet + Steaming Vintage Tyrolean (mini at 16) for a S. Spec KS Australium Scattergun (mini at 37.5) + S. Pro KS Bat (mini at 1.9) + S. KS Rocket Launcher (mini at 0.71)

Thus, x (Glengarry Bonnet) + 16 = 37.5 + 1.9 + 0.71

x (Glengarry Bonnet) = 37.5 + 1.9 + 0.71 - 16 = 24 Keys

Inventory of seller before: http://backpack.tf/profiles/76561198149688091?time=1439190000 (August 10th)

Inventory of seller after: http://backpack.tf/profiles/76561198149688091?time=1439276400 (August 11th)

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Steaming Vintage Tyrolean Mini-suggestion (~ 16 Keys)

Sale # 1 — Sold for 12 Keys pure, seems awfully low (might conceivably be a quicksell)

Inventory of seller before: http://backpack.tf/profiles/76561198003486230?time=1439881200 (August 18th)

Inventory of seller after: http://backpack.tf/profiles/76561198003486230?time=1439967600 (August 19th)

Note: 18 Keys appear as "New" in the inventory of the seller, but 6 are from a separate sale, as indicated by the differences in time and discontinuity in item ID.

Sale # 2 — Sold for a Stormy Storm Berliner's Bucket Helm = 0.9 * 18 Keys = 16 Keys, rounding down.

Inventory of seller before: http://backpack.tf/profiles/76561198081087666?time=1435734000 (July 1st)

Inventory of seller after: http://backpack.tf/profiles/76561198081087666?time=1435906800 (July 3rd)

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>>>Spec KS Australium Scattergun<<<

http://steamcommunity.com/market/listings/440/Strange%20Specialized%20Killstreak%20Australium%20Scattergun

SCM Sales at:

$122.05 CDN

$132.66 CDN

$138.23 CDN

$139.02 CDN

$129.68 CDN

$134.31 CDN

$137.80 CDN

$130.25 CDN

$122.25 CDN

$132.16 CDN

$126.92 CDN

Average:

$131.39 CDN

Keys:

$3.30 CDN

$131.39 / $3.30 = ~40 (high-end)

$131.39 / 1.15 = $114.25 / $3.30 = ~35 (low-end)

Taking 35-40 as mini-suggestion price (~37.5).

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>>>S. Pro KS Bat<<<

http://steamcommunity.com/market/listings/440/Strange%20Professional%20Killstreak%20Bat

SCM Sales at:

$8.10 CDN

$6.85 CDN

$5.92 CDN

$6.41 CDN

$6.71 CDN

Average:

$6.80 CDN

Keys:

$3.30 CDN

$6.80 / $3.30 = ~2 (high-end)

$6.80 / $3.30 / 1.15 = $5.90 / $3.30 = ~1.8 (low-end)

Taking 1.8 - 2 as mini-suggestion price (1.9).

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>>>S. KS Rocket Launcher<<<

http://steamcommunity.com/market/listings/440/Strange%20Killstreak%20Rocket%20Launcher

SCM Sales vary from $1.53 CDN to $3.40 CDN, with a legion of local maxima in between.

Average:

$2.50 CDN

Keys:

$3.30 CDN

$2.50 / $3.30 = ~0.76 (high-end)

$2.50 / 1.15 = $2.17 / $3.30 = ~0.66 (low-end)

Taking 0.66 - 0.76 as mini-suggestion price (0.71).

Final Remarks:

Pure sale took ~3 months (acquired on June 14th and sold on September 10th), which would suggest the sale is representative according to time.

Duped sales can be used conventionally, particularly for lower-tier Unusuals (less than or equal to about 30 Keys in value). However, dupes technically cannot be used to lower a price, according to the official rulebook on the matter. Nonetheless, I do not believe it exerts a very strong influence in this case.

Cannot find any other Bonnets and their respective sales. This should be sufficient.

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As always, constructive criticism and feedback are welcome.