I can only speak from what I have seen locally and it is no where near 70`s or 80`s values. Easiest way to check market values on most items is to look on ebay and use your sort by list !! Click on "ending soonest" to see what ending sale prices are !! Will give you a pretty good idea if anyone is buying them or are they ending without bids at all !! Just pick the ones that are similar in style to yours !!