Peace, mercy, and blessings of God be upon you. Used RAM for sale, only operational warranty. If you are near me, you can come to my house and I will install them, and if they work fine, that's it. If you are far from me or want to install them yourself, there is no warranty. ddr2 1gb = 2 pieces, each for 50 ddr3 2gb = 1 piece, for 75 ddr3 4gb = 1 piece, for 100 ddr4 4gb = 1 piece, for 100 ddr4 8gb = 1 piece (I'm not sure if it's working or not) for 200 For contact, WhatsApp only.