Every month the editors of Washington Consumers' Checkbook magazine report some of the best prices they have found in surveying more than 400 area retailers.

The retailers have promised to hold these prices -- and offer rain checks if supply runs out -- until Nov. 30. A partial listing of bargain prices:

Dishwashers

General Electric GSD-500L: Three cycles, two wash levels with no-heat dry option -- $248, J.R. Enright Co., Chevy Chase (301-654-1700).

Whirlpool DU-8350XT: Four cycles, two wash levels with pots & pans cycle and no-heat dry option -- $309, ABD Appliance, Fairfax (703-273-0612).

Amana DU-5000B: Four cycles, three wash levels with pots & pans cycle and no-heat dry option -- $345, Alco TV & Appliance, Alexandria (703-780-5180) and Fredericksburg, Va. (1-703-373-1797).

Kitchen Aid KUDC-220T: Five cycles, two wash levels with pots & pans cycle and no-heat dry option -- $419, A & A Appliance, D.C. (202-723-3315).

Insinkerator C-700: Four cycles, two wash levels with pots & pans cycle and no-heat dry option -- $435, Metropolitan Appliance, Bladensburg (301-927-2838).

Video Camcorders

Quasar VM-500: Ultra compact (1.7 lbs.) VHS-C format with 6:1 zoom lens, 3 lux minimum light intensity and date stamp -- $710, Theater Vision, Rockville (301-816-0300).

JVC GR-AX7U: Ultra compact (1.6 lbs.) VHS-C format with 6:1 zoom lens, 3 lux minimum light intensity and date stamp -- $829, Paul's Audio-Video, Arlington (703-522-5151) and Tysons Corner (703-827-5797).

Sony CCD-TR4: Ultra compact (1.6 lbs.) 8mm format with 6:1 zoom lens, 5 lux minimum light intensity and date stamp -- $889, Sound Electronics, Rockville (301-984-7504).

Nikon VN-500: Ultra compact (1.7 lbs.) 8mm format with 6:1 zoom lens, 4 lux minimum light intensity and date stamp -- $975, Conn Camera, D.C. (202-293-5484).

Olympus VX-81: Ultra compact (1.7 lbs.) 8mm format with 6:1 zoom lens, 7 lux minimum light intensity and date stamp -- $995, Penn Camera & Video, D.C. (202-347-5777).

Exercise Equipment

Tunturi HomeCycle Super THC3-S: Exercise bicycle -- $145, ASCO Healthcare, Silver Spring (301-585-7711) and Columbia (301-621-8999).

Tunturi Executive Ergometer TEE: Exercise bicycle -- $199, American Physical Fitness, Rockville (301-340-0001).

Tunturi R205: Rower -- $199, Heartline Fitness, Gaithersburg (301-921-0661).

Schwinn DX-900: Exercise bicycle -- $284, Wheaton Sports & Cycles, Wheaton (301-949-1649).

Precor 718E: Climber -- $360, Proteus Bicycle & Fitness Shops, D.C. (202-332-6666) and College Park (301-441-2929).

Stereo Receivers

Kenwood KR-A5020: 60 watts per channel, 20 AM/FM presets and remote control -- $197, Saxitone Audio-Video, D.C. (202-872-8228), Rockville (301-762-8273), Falls Church (703-321-8273) and College Park (301-779-5566).

Yamaha RX-350: 40 watts per channel and 16 AM/FM presets -- $219, Myer-Emco, D.C. (202-342-9200), Rockville (301-468-2000), Beltsville (301-595-7900) and Baileys Crossroads (703-379-8800).

Denon DRA-335: 40 watts per channel, 16 AM/FM presets and remote control -- $237, Audio International, D.C. (202-333-3511).

Onkyo TX-866: 80 watts per channel, 40 AM/FM presets and remote control -- $384, Audio Buys, Baileys Crossroads (703-578-3033), Gaithersburg (301-840-9180) and Manassas (703-968-7513).

JVC RX-903: 100 watts per channel, 40 AM/FM presets and remote control -- $647, Paul's Audio-Video, Arlington (703-522-5151) and Tysons Corner (703-827-5797).

If you feel a retailer has not met its commitments, or if you would like to know more about the Holiday 1990 issue of Checkbook's survey, call 202-347-7283.