I don’t know how much you’re willing to pay, but if you can find it for its original price ($50) then you are doing well. I know of two places to look: BoardGameGeek (BGG) and eBay.
––If you should end up with a surplus of the “cardboard airbase markers” I would be interested in buying them from you. And you can almost always find some A&A-Guadalcanal games on Ebay, just wait for some at your right price.
Good luck finding any set 1 boats or planes cheap. Most things in that set go for $5 and up. I just sold a complete set 1 on Ebay and got $450. Most rares average $20 and up, hell most Planes are $10 and up, even little Destroyers are going for 3-5 dollars each
