A-Tech 4GB RAM for Dell Vostro 460, 430, 260, 260s | (1 x 4GB) DDR3 1333MHz PC3-10600 240-Pin Non-ECC DIMM Memory Upgrade Module at Amazon.com
8GB (2 X 4GB) Memory Upgrade for Dell Vostro 260s DDR3 PC3-10600 1333MHz Desktop DIMM RAM (PARTS-QUICK Brand) at Amazon.com
Refurbished: Dell Vostro 260S INTEL Core i3 3300 MHz 250Gig Serial ATA 4GB DVD-RW Windows 10 Professional 64 Bit Desktop Computer Desktop Computers - Newegg.com