Hi everyone. I'm new to this site and have been researching marbles that I found in a sack of my 95 year old late mom's stuff. There are 11 pounds of marbles. It looks like quite a few are Peltiers. I've been sorting by color. The good old "Sesame Street" method - like things together. So I have some similar Peltier color groups that have 15 to 20 marbles in each group. My question is this: Should I sell all of the same colors together or put together different colors and sell them as a lot? How many in a lot? What do you collectors like? I don't know how to list their condition either. Nothing broken or chipped, but beyond that I don't know. I can borrow my husband's micrometer for the photos, so that the exact size can be seen. Any suggestions that you have would be most welcome!