HP Compaq dc7100 Desktop PC - Intel Pentium 4 3.20GHz, 1GB DDR, 80GB HDD, DVD-ROM/CDRW, 340 Watt PSU, Windows XP Professional (Off-Lease) at TigerDirect.com
HP Desktop PC Pavilion a1140n (PX774AA) Pentium 4 630 (3.00GHz) 1GB DDR2 250GB HDD Windows XP Media Center - Newegg.com
HP Compaq Presario SR5030NX Desktop Computer RX896AA#ABA B&H
HP Pavilion a1025c MT Pentium4 HT 3.0GHz CPU 1GB RAM No HDD No OS - Lake Michigan Computers
Refurbished: HP Desktop PC DC7100 Pentium 4 2.80GHz 1GB 40GB HDD Windows XP Professional - Newegg.com
HP Compaq dc5100 Desktop PC - Intel Pentium 4 2.8GHz, 1GB DDR, 40GB HDD, DVD-ROM, Windows XP Professional, Mouse & Keyboard (Off-Lease) at TigerDirect.com
323091-001I | HP System Board (Motherboard) Pentium-4 Socket 478-Pin for HP EVO DC330/DC530 Desktop PC
Desktop Pcs, Qty Of 2, Hp Compaq Dc5700, With Pentium 4 Ht Processor, Windows Xp Home Licence Sticker, Not Tested. [92452+428]
Upgrading my HP Pentium 4 | Tom's Hardware Forum
HP Compaq dx2200 Intel Pentium 4 @ 3.00GHz * 1 - Refurb SA
Refurbished: HP Compaq dc7600 CMT Gray & Black PC - Intel Pentium 4 531 3.0 GHz 4GB DIMM DDR2 SATA 3.5" 250GB DVD-ROM Windows 10 Pro 64-Bit - Newegg.com