Hobbies And Interests
Research
Find books about antique glassware at a bookstore or library. Specific books on white hobnail and milk glass are in print. Talk to antiques dealers and visit antique shows, taking careful note of high and low prices.
Manufacturers
Many companies manufactured white hobnail glassware, often referred to as milk glass. Fenton and Westmoreland are two of the more desirable company names.
Age, Size, Condition
Older glassware is often more valuable in general. Items in perfect condition will bring a higher price than those that are chipped or cracked. Larger pieces usually command a higher price, but small and rare items may be very desirable to collectors.
Authenticity
White hobnail glassware manufactured by one of the famous makers will bring a higher price than a lower-quality copy. Knowing and documenting the piece's origin helps in setting the price.