Looking forward to seeing some pictures of your bike. These old Dahons have a fan base. You can find some groups on the web that have re-stored or modified and have meetings.

I have re-built/restored a handful myself. Primarily because I could buy them cheap and give them to family members or sell them. They are typically not worth a lot of money even in museum shape, unless its a stainless steel mariner. They are fun, friendly bikes that bring conversation and invite people who normally don't ride to try them out, because of the step thru frame and small wheels. IMO they are not ideal for fast or distance riding.