Classic and Vintage Bicycles: What's it Worth? Appraisals and Inquiries - 1973(?) Schwinn Tandem (copper)

I will need to check the serial number to verify the build date. This bike is in fair condition. All parts are there, but chrome is slightly pitted and a few scratches and dings.

Not asking for an appraisal, just wondering how much work I should put into it and how I can go about determining its value before I put it up for sale.

Well how much work you put it into it is going to depend on how much you want to do with it. If you're going to keep it then I guess go as far as you need to go to be happy with it.

If you're going to sell it - you'd probably be lucky to get $200 or so for a nice one, so you probably don't want to go all out. If it were mine I'd replace the tires if they're old/cracked/worn out, repack the bearings with new grease, oil the cables and adjust the brakes (if it has any - some only had coaster brakes) and pretty much leave the rest as is other than cleaning off any dirt or grime/obvious dirtyness.

If you start going all out replacing the chains, seats, cables, etc. you'll easily spend the worth of the bike.

Thanks for the advice. That is probably what I will do and leave it to someone who either just wants a nice serviceable ride OR let them do a full restoration.