Where can i find out what my hiesey glass collection is worth?

Question:this collection has both signed and unsigned pieces and sets inherited from my 102 year old grandmother

Best Answer - Chosen by Asker: this collection has both signed and unsigned pieces and sets inherited from my 102 year old grandmother

Your collection may be valuable. It might be a good idea to get hold of Heisey Glass 1896-1957: Identification and Value Guide http://www.amazon.com/Heisey-Glass-1896-...
On ebay - sales, only single pieces are being sold (as far as I could see) .For example at http://cgi.ebay.com/HEISEY-GLASS-ELEGANT...
It might be worth your phoning one of the big auction houses - Sothebys, Christies, perhaps and asking whether they deal in glassware. They give free assessments in the hope that you will sell with them.
I dont know where you live but there is sale THIS WEEK in the Heisey Museum, Newark. http://www.heiseymuseum.org/
This place should also be able to answer any of your questions.