99-04 lifespan

Whats the lifespan on a 99-04 Mustang GT if treated decently? I'm looking at getting a new car and despite my love for LS1s I really cant afford one, but I have found a few very affordable mustang GTs

http://autotrader.com/fyc/vdp.jsp?car_id=190522239&dealer_id=57021193&car_year=2000&bkms=1128886626508&model=MUST&lang=en&isp=y&start_year=1999&certified=&search_type=both&distance=25&first_record=76&make=FORD&min_price=1&sponsorModel=&address=33173&advanced=&end_year=2006&pager.offset=75&max_price=13000&cardist=13
does anyone think this is a pretty good deal? I thought it was amazing, considering theres nothing wring with it...

BTW, if the pic doesn't appear jsut click the "view larger photo" button. And I'm not a big fan of the wheels so don't jump on my case.