Hi X Milk glass is a tough one as it was reproduced at later dates from the same molds and much of it is not marked(old & reproduction pieces) you will need to take each piece and research it to find the maker of the piece. The following companies were the most sought after producers of milk glass during the 1920s through 1950s: The Westmoreland Specialty Glass Co., The United States Glass Co., The L.E. Smith Glass Co., Duncan Glass, Fostoria Glass Co., Hazel Atlas and The Federal Glass Co. many books have photos of pieces made by each company ,patterns,molds,sizes,sometimes if it was reproduced etc. This will take some time as each piece will need to be researched separately as some pieces can be rare in certain patterns by certain companies. ebay is a great place to get an idea of what the current selling prices are. As far as selling - antique flea markets are a great place to sell & fun or a small local auction house. If you get stuck and can not track a piece please post photos of that piece with size and bottom and maybe someone here can help but to put a price on each piece of all 30 from your photos is not possible. Good luck
