Car looks pretty clean. It's obvious the guy doesn't want the car anymore if he doesn't want to throw a set of cats and a few other emission pieces on to keep it. It would not be expensive or take long. Low ball him, it's Christmas and he could need the coin. I wouldn't consider a maf an electrical problem. Electrical problems to me are more like a short or major wiring problem he has tried to diagnose but was not successful. Make sure you take a good test drive check all things like wipers, power windows, lights etc.
I would probably look elsewhere. I certainly wouldn't be driving a s/c'd car without the maf plugged in, let alone if it had just a h/c/i. It might be just me, but I wouldn't buy a car with known problems and try to fix them, yeah it may be a quick fix, or it may not. I have had my fair share of issues with a used vehicle that seemed like a good deal.
heads/cam/12 pounds of boost on a stock tranny if you buy it plan on saving some cash as a just in case policy cuz nobody does all that to a car and doesnt drive it hard..... atleast I don't just saying cuz when I bought mine it was a bolt on car but had purge holes drilled and they left the WOT switch bracket on so I knew it had been spayed and 2 1/2 months after I bought it the tranny was toast.
32 lb injextors on a blown car? A T5? 3.08 gear? Probably fried the computer and its in limp mode(failed maf mode), and may need some diagnostics to find and fix the underlying issue. Sweet looking coupe tho, but not worth the coin. Cool blower tho, one of my favs.
His response: "I'll have to pass on that offer. The supercharger alone is worth 3k. You are devaluing the car because its not everything it could be rather than valuing what it is. I understand it is a work in progress, but the lowest I will go is 6k"