Unless the sheets are for widely desirable stuff, I'm thinking not much. I see Altec sheets listed for $15 or less get re-listed many times. The catalog might sell more easily, but that's just a guess. It's not like finding a binder of Altec tech sheets/drawings/manuals that you'll see sell for a bunch of money.
I'd find the catalog interesting, but I'm not in a position to buy, now.





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