Noctua Redux P12 1300 PWM - 6 pack. The fans are very lightly used and in great condition. Also includes a bag of fan screws and some Noctua vibration dampening fan mounts (quantities shown in the last picture).
Great fans to use in any PC case, on an AIO, Tower Cooler, etc. and since they're PWM you can set customized fan curves for each of them in BIOS or using software like Fan Control.
Noctua fans are widely regarded as the absolute best quality on the market. They run quietly, move a lot of air, and should last for years with no problems.