Three is no shortage of cards from the 50's and 60s (unless you mean the 1860s). Don't buy anything for the first half of the time you are at the show. Just compare prices. Take a notebook so you remember who had what and at what price. Hopefully, you will then know the market, and in the second half of the day go back to the best sellers and negotiate. On that kind of stuff, unless it is really high grade or really scarce, bid no more than 75% of their asking price as a starting point.
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