Lot of (4) Centon PC2-6400 2 GB DIMM 800 MHz DDR2 SDRAM Memory (2GB800DDR2).  Selling as used, but do not believe these were ever installed in a computer.  2 of the clamshells are completely sealed, 1 has the top open and the other is completely opened.  Please review pictures of actual item(s) and condition. Pre-owned very good condition is what we think the condition is, but please make your own judgement about the condition of the item with the pictures provided.   If you have any questions, please contact us and we will do our best to provide any additional details you may need.  Thanks for looking!