DDR4 16GB desktop DIMM (single, non-ECC) typically costs $18.20 less than DDR4 16GB (2×8GB) 3200 on eBay right now ($69.99 vs $88.19 median asking price, item + shipping). Per GB, DDR4 16GB desktop DIMM (single, non-ECC) is cheaper: $4.37 vs $5.51. Prices from filtered US eBay listings, checked twice a day; asking prices, not sold prices. How we price.