If you go to the ebay listing for these wine glasses,, look in the left column and you will see completed listings,and sold listings !! Click on the sold listings to see the actual selling prices !! That will tell you what people are actually paying for the same ones !! Completed listings will give you the asking/start prices and sold prices !! This may help you decide what price to start your glasses at !!
From what I can find much of Baccarat is unsigned and only had a paper sticker identifying it !! Later pieces were etch marked and in 1990 laser etching began on their products !! Malmaison pattern was originally issued in 1913 and reissued in 1956 for the wedding of Prince Ranier and Grace Kelly !!