What's a coin show? Is it like a coin market that only meets once a year?
Random jokery aside (though I really had never been at a numismatic event with a lesser frequency than weekly... okay, a few book shows I've visited had a tiny numismatic section), much of the above is oriented on people with a much higher budget than me.
For me (under modern exchange rates), a $5 coin must be very good indeed to justify such a high price, and I'm unlikely to buy a $10 coin unless it's very rare and/or silver; most of my purchases fall in the $0.1 to $2 price range, and only very few are higher (a few are lower).
One big area of my collecting is old (or otherwise uncommon) coins in cull grades (though I typically stay away from holed or otherwise obviously heavily damaged coins), for cull prices. (Not really sure why - maybe I like the idea of having an uncommon coin so cheaply, maybe I just like the history.)
There's a lot of them at coin markets, in dealers' junk bins (some dealers are very surprised when I'm able to identify a cull-grade coin). I doubt that a typical coin show would have especially many; it's far too low-end!
One place, when noticing what I'm looking for in junk bins, gave me the option of looking through their cull box for especially low prices (less than $0.02 per coin). I found a few very nice (by my opinion) coins in there, came again for that box two more times.
Then one time, after I looked through and left, they call me two hours later (I was passing by their place, going to another dealer) and say that another guy left and bought all the other coins in that cull box

sadly, there still were no new culls for me when I went there a month later.