I just getting into this since i'm a poor teenager and I want something to work on....
Seen this for sale.. 200$ seems a little steep but what do I know..
no details at this time on the kart just pics. (green one)
http://detroit.craigslist.org/okl/sno/4018071663.html
....This is just a 'personal opinion' but 'if' I were you and wanted to 'work' on something... I would choose a much more modifiable frame/design. "That" kart you posted for $200. you could add $50 and get
http://detroit.craigslist.org/okl/sno/4045272717.html ... which in my opinion is MUCH more modifiable than the one you posted. Nothing 'against' that one, but it looks like someone got a plan for a 'cheap' made frame/design, and made more than one of em(probably spent close to 100-150$ mats...maybe less if he 'had' the mats already). That one you linked, Id have to say you WILL be limited w/ what you 'can'/'want' to do w/ it....imo.
I may be way off on this... but I found this
http://detroit.craigslist.org/okl/mpo/4043169025.html ... not sure your area n distance... but if I wanted a cart to work on id travel probably up to 50 miles for this links cart... or atleast id contact him n see whats up. Imo it would be a perfect "...and I want something to work on...." cart. And something like that could probably still fit in a normal car's trunk(tied down). My 2 seater fits in my Toyota camry's trunk(just gotta remove steering wheel), with just the motor n rearend sticking out.
...and yes ppl would laugh at me and point as I drove down the road... cart rear sticking out of back of trunk... and a 4ft safety flag whipping in the wind...

. a cop pulled me once "...to make sure it was secured properly...". He was such a liar... he just wanted to see the whole cart...lol. Had me pull it out n start it, asked a butt-load of ?'s bout it...blahblahblah. then gave me a warning ticket...lol that bass turd!
Type "go cart" or "go kart" in your area's main CL page... some ppl post things in 'wrong' catagories, so going to atv/motorcycles and searching there... you could be missing out on a kick butt deal!
... But I agree w/ Souper... $200 is abit steep for such a simple lil cart like that.