I see a lot of Chestnuts. If the canvas is good and the gunnels and ribs are intact then it is easily worth the asking price. Most canadian canoes are undervalued. Early 70s aint late 70s.
Check the boat for fairness by looking from the bow and stern along the bottom looking for hardpoints that signify broken ribs or planking.
Look from the top to see if the gunnels have hard points signifying breakage.
Feel midships under the gunnals for soft or rotten ribs.
Feel the canvas near the stems for paper thin canvas that tears away like paper signifying canvas rot.
If none of the above buy and use the canoe.
Interior refinish can come later but remember that the wood must be protected by varnish or paint (easy to do unless you are doing a total refinish, and then it is a satisfying project.)
$ 1500.00 is not unusual in a recanvas and repair project in a professional shop.
John