I recently picked up a (approx 1975) T100 from a guy who couldn’t sell it on Ebay for $600. The way I look at it is that its a very well made guitar with all the cool trimming that plays great. I’ve learned a little about these guitars thru google and it is kind of a cool little story, but the bottom line is I couldn’t replace it for what I would have to sell it for. So, I’ll just keep it and really enjoy playing it. Since there seems to be no difinative(please excuse my poor spelling) price guides for these guitars, I would guess you’d have to lump it in with all the other finely made Japanese guitars of that era….