Hello Elizabeth. Sorry to read you lost your Nan. Given that you don't have much time, I would suggest you take them to a reputable auction house. You could ring a few local ones and ask if they have a paperweight expert. With any luck, they can take out the more interesting ones to list separately, and make up smaller lots of the remaining, perhaps more common, pieces. If you wanted to let us know where in the country you are located, there may be a board member who could suggest an appropriate auction house.
Good luck
Cat