1 year

Sale #1:

https://backpack.tf/item/280652793

https://backpack.tf/profiles/76561198061440669#!/compare/1724803200/1724889600

https://backpack.tf/profiles/76561198098565783#!/compare/1724889600/1725408000

211 keys + 20.55 ref + 52.33 keys in sweets (Strange Red Socks ~ 4.28 + Strange Grenade Launcher ~ 0.54 + Holy Grail Taunt: The Bunnyhopper ~ 2.38 (buyers at 2.15) + Strange Battery Canteens (9) + Strange Australium Wrench (31.5) + Strange Rocket Launcher (1) + Strange Rescue Ranger (0.25) + Strange Black Box (1.3) + Strange Eyelander (1.4) + Strange Wrangler (0.26) + Strange Pistol (0.42)

= 264 keys, rounding to 265.