2GB Memory RAM Upgrade for Dell Optiplex 755 Mini Tower DDR2-800MHz 240-pin DIMM | eBay
8GB 4X2GB RAM for Dell OptiPlex 755 Series Desktop/PC DDR2 PC2-5300 RAM Memory | eBay
Dell OptiPlex 755 Tower Core 2 Duo 3 GHz - HDD 1 TB RAM 4GB | Back Market
Dell OptiPlex 360 Desktop Computer Intel Core2 Duo 2.33 GHz · 4 GB RAM · 160 GB Windows 10 Home 64 – RefurbishedPC
Refurbished: Dell Optiplex 755 Small Form Factor Desktop (R2/Ready for Reuse) with Intel Celeron 430@1.80GHz, 2GB RAM, 80GB HD and licensed Windows 7 Home Premium from a Microsoft Authorized Refurbisher - Newegg.com
OFFTEK 2GB Replacement Memory RAM Upgrade for Dell OptiPlex 755 Series (Desktop Mini-Tower and Small Form Factor) (DDR2-6400 - Non-ECC) Desktop Memory at Amazon.com
Best Buy: CMS 2GB (2x1GB) RAM Memory Compatible with Dell OptiPlex 755 DT / MT / SFF Desktop CM128646400DIMMX20201
Dell Optiplex 755 PC Computer Tower Windows 10 Professional (Win 10) 4GB RAM 250GB
2GB Memory for Dell OptiPlex 755 DT/MT/SFF/USFF DDR2-800 PC2-6400 Desktop DIMM RAM (PARTS-QUICK Brand) at Amazon.com
Refurbished: Dell Optiplex 755 Small Form Factor Desktop (R2/Ready for Reuse) with Intel Celeron 430@1.80GHz, 2GB RAM, 80GB HD and licensed Windows 7 Home Premium from a Microsoft Authorized Refurbisher - Newegg.com
2 GB Dell New Certified Memory RAM Upgrade for Dell OptiPlex 755 & 760 Systems SNPYG410C/2G A2149880 at Amazon.com
Dell Optiplex 755 Desktop PC 4GB RAM, 128GB Solid State Drive + 2TB HD – RefurbishedPC