Is HP Z400 Workstation Xeon Quad-Core W3565 3.2GHz 8GB 1TB DVDRW Windows 7 Pro any good?

I want to know if this computer is any good because my son wants to use it for gaming, for games like starbound, minecraft and gta 5 when it comes out for pc, he mainly wants to use steam whatever that is, please reply. Serious people only.

Yes, it's a few years old but still holds up well. You'll need to add a graphics card in the region of $180/£130 to make it play those games well. It likely comes with a weak workstation graphics card. Don't pay more than $450.