That is a good deal. Looking at the specs, which are a bit vague, it appears to be using integrated video. Probably intel, which has issues with emulators and linux. If the motherboard has a slot for a discrete video card, you could spend 50 bucks and have a nice htpc/emulator box.
If it doesn't have a video card slot, and a lot of these low end business class workstations don't, caveat emptor.
EDIT: GoogleFu has shown that the motherboard for these is an Intel Desktop Board DG41CN, which has a single PCI Express 2.0 x16 slot. If these truly have this motherboard, IMHO they are a good deal and if you have an older NVIDIA PCI express video card hanging around, it would be a good mame/emu box.