The hypers a good buggy anyway and it sounds a good deal. Have a look round to see if you can pick up an OS RG carb though. The hyper 8 port is a good engine but it is supposed to have carb issues (search the forum). The OS carb sorts these out apparentley. The pipes a good 'un, and the wheels are worth a few $ if they're new.
I've just got a hyper TQ (bought as a kit) with a few choice upgrades and its great. If you're sure its not been mistreated get it, Theres TONS of spares available and more advice than you can shake a stick at.
Let us know if you get it and how you like it.