It seems most of the coins are cleaned, damaged or have environmental issues. I’d rather buy a single problem-free coin for $8 than a bag of damaged coins.
But, for the price of a movie ticket, you can have hours of excitement and entertainment that an easily purchased coin may not be able to provide .
That 1850 half penny with the square hole was probably nailed to a door post for good luck. Back in the 1800s most of the nails were square.
That engraved Canadian large cent is quite interesting. Worth $8 by itself. To get multiple silvers in an $8 bag is also pretty remarkable.
The British sixpence, Norway 50 ore and Mexico 50 centavos are the good ones. Old Mexican silver is hot.