IBM THINKPAD R51 15" Laptop Intel Pentium M 1.7GHz 1GB RAM - BOOTS -JJ $50.00 - PicClick
1GB 2X512MB RAM Memory for IBM ThinkPad R Series R51 ( Type 2883ARU ) Black Diamond Memory Module DDR SO-DIMM 200pin PC2700 333MHz Upgrade - Newegg.com
IBM ThinkPad R51 Pentium M 725 1.6 GHz No Ram 15" Powers No Boot- FT | eBay
Vintage IBM ThinkPad R51 14.0", Pentium M 1.6GHz, 512MB RAM | eBay