Buy it!
That's a great, if not fantastic price for a 2008 with so few miles. I bought one with V6, air susp, hitch, nav and 34,000 miles on the clock in May for $28,900 and don't regret if for an instant.
Never had an SUV before and did a lot of research before buying this one. The treg rode better than both the X3 and X5, out-perfomed the V6-X5, was nimbler handling than the Lexus 470, has a superb interior, and the dealer was vastly better than any of the three Infiniti excuses-for- dealerships I visited.
Interesting car credentials:
'57 Chevy Nomad w/powerpack
'57 Chrysler Windsor w/Hemi
'58 MGA w/rebuild and bored-out engine (by me)
'69 Cougar w/351 Cleveland
'68 MGB Abarth rally car (in Germany)
'70 BMW 2800 (in Germany)
'72 Jaguar XKE Roadster (6 cyl, short-body, in Germany)
'73 Pontiac TransAm
'76 Pontiac TransAm (emissions strangled)
'77 Mazda Cosmo w/Wankel (a true sleeper)
xxx period of boring 'family' cars...
'88 Nissan Maxima 5-Spd
'97 Chrysler LHS (another underappreciated car)
'98 BMW 740i
'04 Chrysler Crossfire
'07 Cadillac CTS-Sport
'08 VW Touareg V6