Read "Are Your Old Records Worth $$$ ?" High fidelity, January 1980. A detailed, informative article surveying the classical and popular recordings-resale market, including advice on where to sell.

Price Guides

* "Official Price Guide" series ($7.70 to $10.95) and "A Guide to Record Collecting" ($6.70) by Jerry Osborne and Bruce Hamilton (O'Sullivan Woodside and Co., 2218 E. Magnolia, Phoenix, Ariz. 85034). Also available at some record stores.

* "The Official Price Guide to Collectible Rock Records" by Randal C. Hill ($8.95, House of Collectibles, Inc., 773 Kirkman Rd., No 120, Orlando, Fla. 32811).

* "The Collector's Price Guide to 45 RPM Picture Sleeves by Ron Lloyd and Marvin Davis ($7.95, Winema Publications, P. O. Box 172, Medford, Ore. 97501).

* "Price Guide to Collectors' Records" by Julian Morton Moses ($9.95, American Record Collectors Exchange, P.O. Box 2295, New York, N.Y. 10017).

Other Options

* Contact local dealers (listed under "Records" in yellow pages). An appraisal fee (flat or percentage) may be charged.

* Consider selling your records yourself through advertisements in newspapers or collection publications, or on consignment at auction.

* Give them away to charity as a tax-deductible donation.

* Or, if you can't bear to part with your old discs and want to become a collector, you can join ARSC (Association for Recorded Sound Collections). For collectors, discographers, dealers, librarians and archivists; $15 annual membership includes ARSC Journal, bulletin, newsletter and invitation to national conferences. Contact: Les Waffen, executive secretary, P.O. Box 1643, Manassas, Va. 22110.