 Also, since half-dollars rarely circulate, most bank tellers are unaware of the proper length and/or weight of a roll.Also owing to their lack of circulation, the missing coins are not likely to be discovered for a long time.As the practice of coin roll hunting has steadily grown more popular, unscrupulous sellers on eBay and other online storefronts may try to pass off coin rolls as "unsearched" or "original bank wrapped", when in reality the rolls have been opened, seeded with coins that do not belong or are extremely unlikely to be found in a roll, such as mercury dimes in rolls of wheat cents, or Morgan dollars in "bank wrapped rolls" (these coins were never supplied to banks in rolls, instead being sent in cloth money bags, thus meaning that any rolls of Morgan dollars that do exist were rolled by a third party), then sealed shut in an attempt to make them look authentic.