Q: We recently acquired two bushel baskets filled with old carnival glass that belonged to my husband's grandmother. How can we check out the value?

A: The value of pressed and iridescent glass produced between 1905 and 1930 depends on the piece and its color, condition, pattern, shape, origin, rarity and desirability.

"The Standard Encyclopedia of Carnival Glass," by Bill Edwards, is available for $26.95 postpaid from Collector Books, Box 3009, Paducah, Ky. 42002-3009; (800) 626-5420. "The Antique Trader Antiques and Collectibles Price Guide," edited by Kyle Husfloen, is available for $13.95 postpaid from the Babka Publishing Co., Box 1050, Dubuque, Iowa 52004; (800) 334-7165.

Carnival glass collectors belong to the International Carnival Glass Association, which offers an annual membership and quarterly publication for $10 from Route 1, Box 14, Mentone, Ind. 46539.

Q: I have a "Star Trek" pillow case and would like to know if it would have any value. How do I reach "Star Trek" fans?

A: According to "The Official Price Guide for Star Trek and Star Wars Collectibles" ($12.95 postpaid from House of Collectibles, Random House, Westminster, Md. 21157), pillowcases made by Pacific Mills are worth $10 to $15 each, $5 to $10 if made by Cannon. The Random House phone number is (800) 733-3000). Write to the Official Star Trek Fan Club, Box 111000, Aurora, Colo. 80011, or Star Fleet, Box 430, Burnsville, N.C. 28714, enclosing an addressed, stamped envelope.