mobic 415as or dahon speed d7?
 

Both on Craigslist. The Dahon is used by a guy weighing in at 235 for a summer but appears to be in good shape (the bike, that is). The Mobic is virtually unused. Dahon asking $400 (I'm willing to go to $300), the Mobic $200.
It's going to be used for train commuting...I've ridden for years and have other bikes for road and mountain.
Please weigh-in...and thanks, in advance!