Not sure why you excluded Sale 1:

CTF Antlers sold for:

Strange Haunted Phantasm Jr Law - https://pastebin.com/N0Cb4HLy - 625 keys as a mini

Green Energy Team Captain - https://backpack.tf/suggestion/64a434f36ad123d38b024872 - suggestion up for 350 keys

Smoking Batter's Helmet - https://pastebin.com/7DAP0Z9Q - no usable sales, 2 @ buy orders ~9 keys ish

Strange Baseball Bill's Sports Shine - https://prnt.sc/f2vsYp2DaorP - 3.5/4 keys at the time

625 + 250 + 9 + 4 = 888 keys

This rounds to about 900 keys tbh, rounding up the Batter's error and to the nearest 50 keys or smth like that.

Sale 2 is specified here:

https://backpack.tf/suggestion/6483cf8fdba9a86d5e0197a0

"Phosphorous Viewfinder for 820 keys pure + C9 Pullover (placeholder for 1180 keys) + TF Logo Antlers (placeholder for 1300 keys)

https://backpack.tf/profiles/76561198057452720#!/compare/1685404800/1685491200 (OrangeZest)

https://backpack.tf/profiles/76561198152373135#!/compare/1685404800/1685577600 (Punch)

https://imgur.com/a/djID1MQ"

Sale 3 isn't really a sale, it was a placeholder as mentioned above

Item 2 is a dupe - https://backpack.tf/item/3488502166

https://prnt.sc/KE47H9cBI1sy - IDs

Concluding thoughts:

This should be resuggested at 900 keys flat, 1300 was more of a placeholder and wasn't a real sale as confirmed by OrangeZest in his suggestion over at the Phos VVF.

Wait for a mod comment thought