Every month the editors of Washington Consumers' Checkbook magazine report here some of the best prices they have found in surveying more than 300 area retailers.

The retailers have promised to hold these prices -- and offer rainchecks if supply runs out -- until Aug. 31. It is a good idea to call ahead to check that a product is in stock. Explain to the retailer that you want the price quoted in "Checkbook Bargains." Stores may limit purchases.

Here's a partial listing of bargain prices based on Checkbook magazine's survey.

Trash Compactors General Electric GCG900 -- $349 at all Reliable Home Appliances. Call 937- 7177 for locations.

Kitchen-Aid KCS200 -- $466 at J.R. Enright Co., Chevy Chase (654-1700).

Thermador TMC28 -- $529 at A&A Appliance Co., in the District (723-3315).

Whirlpool TF4500XR -- $299 at all Reliable Home Appliances. Call 937-7177 for locations.

Garbage Disposals General Electric GFB1050, .75 horsepower, batch-feed -- $140 at all Reliable Home Appliances. Call 937-7177 for locations.

Kitchen-Aid KBDD200S, .5 horsepower, batch-feed -- $169 at A&A Appliance Co., in the District (723-3315).

Kitchen-Aid KCDC200S, .5 horsepower, continuous feed -- $94 at J.R. Enright Co., Chevy Chase (654-1700).

Waste King SS8000, .5 horsepower, continuous feed -- $215 at all Reliable Home Appliances. Call 937-7177 for locations.

Rowing Machines Avita 950SL -- $288 at American Physical Fitness, Rockville (340-0001).

Precor 612 -- $239 at Springriver Corporation, Rockville (881-5694), Falls Church (241-2818).

Precor 620 -- $299 at College Park Cycles, College Park (864-2211).

Pro Form 520 -- $266 at American Physical Fitness, Rockville (340-0001).

Tunturi Rowing Machine 2 -- $199 at Accredited Surgical Co., Silver Spring (585-7711).

Walk-Around Stereos With Headphones Aiwa HS-T600, AM/FM radio, cassette player, auto reverse, dolby b nr -- $169 at Saxitone, in the District (872-8273), Rockville (762-8273), Alexandria (671-8273) and Falls Church (321-8273).

Sony SRF-5, AM/FM radio -- $60 at Graffiti Video in the District (296-8412).

Sony WM-D6C, cassette player, dolby bc nr -- $300 at Conn Camera & HiFi in the District (293-5484).

Toshiba KT-4066, AM/FM radio, cassette player, auto reverse, dolby b nr -- $76 at all Evans Distributors & Jewelers, Rockville (770-6400), Laurel (725-6200), Alexandria (256-6700), Arlington (892-2800), Fairfax (425-9000) and Manassas (631-2333).

If you feel a retailer has not met its commitments, or if you would like to know more about Checkbook magazine's Bargains survey, call (202) 347-7283.