T420. should only run about $275 refurbished. you want intel graphics. fill it with 8Gb memory. simply great with Archlinux. with a 9cell battery and standard h

T420. should only run about $275 refurbished. you want intel graphics. fill it with 8Gb memory. simply great with Archlinux. with a 9cell battery and standard hard-drive tuning (consider swapping in a SSD sometime) you can easily get 8hours on a charge.