If the ad is indeed still up, do a screen shot and post it here for posterity...before it goes POOF. I try to do that for everything I've bought off CL just for record keeping.
I love CL and the general populace who place ads for things in which they don't what they have, don't know its value or they just deliberately underprice it and/or just want it gone.
I wouldn't do a thing to that kart, to possibly include riding it. It might be too fragile and spare parts (my guess), forget it!