i found this dell optiplex 755 in a scrap yard perfectly functioning{came with side panel just have it off} its ungodly slow with only a single stick of ddr2 2gb ram and
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Dell Optiplex 755 SFF C2D E7200@2.53GHz, 3GB Ram, 250GB HDD, Win10 Home #2AV – San Diego
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Dell Optiplex 755 Pentium Dual Dore 200 Ghz 2gb Ram 80gb Hdd For Sale in Milltown, Kerry from 555guy
Dell Optiplex 755 Tower Core 2 Duo | 4GB RAM | 160GB HD | Chrome OS - GreenIT Schools
Introducing Dell Optiplex 755 Intel Core 2 Duo 2600 MHz 80Gig Serial ATA HDD 4096mb DDR2 Memory DVD ROM Genuine Window… | Desktop pc, Pc computer, Desktop computers
Solved: OptiPlex 755 upgrade - Dell Community
Dell Optiplex 755, Intel Core 2 Quad Q6600, 4GB RAM, 250GB SATA HDD, W – LinkAlone Networks
4GB 2X2GB Memory RAM for Dell OptiPlex 755 Mini Tower 240pin PC2-5300 667MHz DDR2 DIMM Black Diamond Memory Module Upgrade - Newegg.com