That sounds like a new trick to me. The hardest part about selling coins on
ebay is all the frauds who make outrageous claims about what they offer. I am willing to bet that less than 1% of all the
ebay listing which claim to offer "unsearched" rolls, bags or lots of any kind are genuine.
Unless I am selling a roll of all the same issue coin in the same condition, i.e. a roll of nickels I removed from a us mint bag, I lay all the coins out on my scanner and scan them front & back and sell them as a "random roll."
There's too much chicanery on
ebay, so while you can get real deals you have to learn to know which sellers to trust.
Another trick I learned is to search for just "pennies" or "nickels" in the roll section and check-out what else the seller has to offer. You stand a better chance of finding valuable coins, rolls and lots from sellers who don't focus on coins and are just trying to sell grandma's collection of coins they found in a jar after she passed. I know one friend who scored a 1955 double die that way, and another who got a 1941/2
Mercury dime.