2002 Boxster S for $18k, good deal?? A couple of Q's

[phatjoe]

Hey:

I'm about to pull the trigger on a car this weekend (tired of searching )

I came across a 2002 Boxster S for $18k. It has a 47k miles on it, and appears to be in top notch condition.

I did a search on cars.com and autotrader.com, and I couldn't find an "S" close to the $18k number. That being the case, I'm still curious if folks are snagging the "S" for a cheaper price than $18k?

This next question may sound funny
I never hold onto a car for more than 2 years. I'm also considering a 2005 Z4, 2.5i, manual, for $17.7k. Come 2 years from now, do you think I'll have a hard time selling the porsche because it will be 9 years old?? The Z4 would only be 6 yrs old.

Thanks....