I've played a few of these and I've found the tone to be pretty consistent from Pancake to Pancake. The asking price seems a bit high for the one you are looking at IMO. It would have to be in mint condition - both Mando and case + being a 2N or 3N to get up in that price range. If you are patient, you can find them for less than $750. Even with the pre-Gibson date, it's on the high side. Personally, I don't value a pre-Gibson Pancake over a Gibson Flatiron Pancake. They were made in the same factory by the same people. YMMV.
M.A.S.ing for a Pancake. You just welcomed in the Jr