There are a number of sellers out there who sell mystery packs. They advertise a whole bunch of stuff that looks like gold and certified valuable coins from an estate sale, and your bid is for let's say 10 items from the 400,000 in the estate sale. Never, never be suckered into bidding on this sort of stuff!!  You'll end up with 10 little pieces of garbage: new pennies, worn Kennedy halves and that sort of stuff.  It's always someone else who gets the valuable pieces. I'm talking from experience here. Only these slimey sellers come out ahead on these shady deals. Stay far away from them. God bless. Larry