1977 Low 7 Nickels

Have you looked on ebay? Low 7's are quite common. If you think indeed they are MS-62 or higher, then it seems to me that you'd want to consider your purchase price to account for cost of grading vs potential value, in order to not lose money.

But what I really wanted to mention was in the 70s according to some related experience, Loomis was a simply a cash armoured car service for banks and other institution but it didn't supply coin, therefore I'd have to wonder when this " Loomis roll" was rolled and if it indeed is MS.