If I found a '74 Honda CB350 four-cylinder like I had in college in reasonable shape I would buy it in a heartbeat.
On folders, I know quite a few people with elderly wood frame Kleppers and Folbots. Well-maintained they have a long useful life. You might get more feedback over at the folders forum: http://www.foldingkayaks.org
As a long time folder fan (my first touring kayak was a folder and I have always had at least one in the armada) I have to say that the "hassle" of assembly is often overstated. The effort involved is, at least in my opinion, more than counterbalanced by the convenience and relative lightness of the boats, especially when you consider the cost, headaches and time considerations of renting when traveling.
Yes, one usually has to pay $25 to $50 each way in excess baggage charge when flying with a knocked down folder, but when you consider a rental in most areas for a competent kayak is $50 to $100 per day, the bottom line is that a half hour to 45 minutes for setup is a small price to pay.
And the lightness factor is pretty significant particularly for us smaller (and/or older) folks. The typical folder is 25% to 50% lighter than a hardshell of similar dimensions.
There is also the security factor on a trip of having your kayak locked in the trunk of the rental car or in the closet of your motel room.
Kayak Deck Gear Bags
Kayak Motor Kit
Hardshell Kayak Sail Rigs
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