G.SKILL Ripjaws S5 Series DDR5 RAM (Intel XMP 3.0 & AMD Expo) 32GB (2x16GB) 6000MT/s CL36-36-36-96 1.35V Desktop Computer Memory U-DIMM - Matte Black (F5-6000J3636F16GX2-RS5K)

Condition: Used ~6 months

Amazon Listing: https://www.amazon.com/dp/B0BJ181PX7?th=1
Comparable items currently ~$350-450 new.