I got this Dahon Mariner from craigslist. The guy I got it from kept it in his attic for years and its cherry. I just needed to oil it up and it rides smooth. I think its a great bike but quite heavy, the thing is like all steel.
The only real problem is the plastic parts of the bike seem to be deteriorateing. The plastic disk behind the cogs crack to the touch. The front fender broke off when I took a tumble, I'm still learning how to ride. The plastic shield around the chain is a gone too. Who says plastic lasts forever.
I'm thinking about getting new brake paddles. The stock paddles dont have the reach adjuster, I have to reach pretty far to grasp the paddles.