That's so cool. I'd imagine maps probably cost a small fortune.
They don't! I picked up a mint one for $25 and a couple used ones for $12/each. The frames will be the real investment. I have four that are an inverted T shape, so I might get the two corners to make a 2x3 shape. I think the cost depends on rarity, and these were sort of mass produced.
Yeah, framing can be expensive. When I had my car ads professionally framed it cost about 10 times more to frame than the ads themselves cost and we're talking about magazine pages. To be fair, I did choose acid free matting, UV protective glass, the whole nine yards. But damn, framing is expensive. Anything you can do to save money on something as big as maps could really help put a dent in that.