Refurbished: Dell Optiplex 745 Mini Tower Pentium D Dual Core, 3.4 Ghz, 500 Gb Hard Drive, 4 Gb Ram, Windows 7 Home Premium - Newegg.com
Amazon.com: Dell OptiPlex 3050 Small Form Factor Business Desktop (Intel Pentium G4400, 4GB DDR4, 500GB HDD, DVD/RW), Windows 10 Pro (Renewed) : Electronics
I opened up an old Dell desktop pc with an Intel Pentium 4 processor and Windows XP on it. Pretty neat blast from the past : r/pcmasterrace
Dell OptiPlex GX520 Pentium 4 3.0GHz 1GB 80GB CDRW/DVD XP Professional Desktop | Desktop computers, Refurbished pc, Dvd drive
Dell Optiplex GX620 Tower Pentium D
Solved: 533 MHz FSB Pentium 4 Processor for a Dell Optiplex GX280 machine - Dell Community
Dell OptiPlex 3010 Intel Pentium|$ 149.99
Dell Optiplex GX620 500GB HDD Desktop Computer Intel Pentium 4 Processor 4GB DDR2 Windows 7 Pro
Office Depot
Dell Core 2 Duo 4GB 250GB Desktop l Discount Computer Shop Online
Dell Optiplex GX240 Desktop PC Computer Intel Pentium 4 P4 1.70GHz 512GB No HDD | eBay