It's a good brand, you can count on its original quality. If I bought it I would service it and I would not try to upgrade it. It's an orphan - Probably Suntour drive train, definitely 27 inch wheels and freewheel hub. I held out for a bike I could service with parts available at retail today - that meant V-brakes, freehub, and Shimano-compatible index drive train. I wound up with a 2000's Burley Samba.
Whether it's a good deal really depends on your local market. Sacramento where I live is a bike paradise and our Craigslist has six Santanas for sale right now for $500-2900, six Cannondales, three Burleys, three Fridays, two Co-Mo's, two KHS, and a Gary Fisher. If this is the only good quality tandem for sale in a day's round trip from you, then you gotta decide whether you want a used tandem at all.
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Genesis 49:16-17
Last edited by Darth Lefty; 05-06-19 at 12:34 PM.