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 rain checks if supply runs out -- until July 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 to one per customer.

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

Sony camcorder model CCDV8AFU, 8mm format, automatic focus, direct playback, special effects -- $1,228 at Murrell's Television Inc. in the District (338-7730).

Quasar camcorder, model VM11C, VHS format, automatic focus, direct playback, high quality (HQ) recording circuitry -- $1,295 at Paul's Audio Video Center, Vienna (827-5797), and The Stereo Man, Arlington (522-5151).

JVC camcorder, model GR-C7, VHS-C format, direct playback with carrier tray included, high quality (HQ) recording circuitry, up to one hour of recording -- $1,350 at Paul's Audio Video Center, Vienna (827-5797), and The Stereo Man, Arlington (522-5151). BINOCULARS

Pentax binoculars, model 7x50 ZCF-HG, 7x magnification, 50mm objective diameter lenses, 407-foot field of view at 1,000 yards, porroprisms -- $66 at Pro Photo in the District (223-1292).

Nikon binoculars, model 9x25 CF, 9x magnification, 25mm objective diameter lenses, 98-meter field of view at 1,000 meters, porroprisms -- $100 at Conn Camera & HiFi in the District (293-5484).

Minolta binoculars, model 8x24 Pocket, 8x magnification, 24mm objective diameter lenses, 330-foot field of view at 1,000 yards -- $125 at District Camera Shop in the District (393-6585) and Embassy Camera Center in the District (483-7448). WASHERS

General Electric washer, model WWA5600G, large capacity, 3 water levels, 3 wash/rinse temperature combinations, 3 cycles -- $300 at J.R. Enright Co., Chevy Chase (654-1700).

White-Westinghouse washer, model LA600E, large capacity, 4 water levels, 4 wash/rinse temperature combinations, 4 cycles -- $349 at A & A Appliance Co. in the District (723-3315).

Maytag washer, model A712, extra-large capacity, infinite water levels, 5 wash/rinse temperature combinations, 5 cycles, bleach and fabric softener dispenser -- $524 at Buls Maytag Home Appliance Centers, Rockville (231-0844), Silver Spring (589-3363), Vienna (281-4890), Springfield (644-2977), Alexandria (765-2206), Fairfax (385-9717) and Herndon (471-0881). EXERCISE EQUIPMENT

Tunturi exercise bicycle, model Ergometer ATEE, precision controls, quiet disc brakes, tachometer/odometer, infinitely adjustable tensions -- $269 at College Park Cycles, College Park (864-2211).

DP exercise machine, model BodyTone 300, aerobic home fitness center, alternate rowing machine, curl, shoulder press, squat and bench press capability -- $96 at Evans Distributors & Jewelers, Rockville (770-6400), Laurel (725-6200), Arlington (892-2800), Alexandria (256-6700), Fairfax (425-9000), Manassas (631-2333).

Tunturi rowing machine, model ATRM, hydraulic cylinders, independent rowing arms, infinite leverage adjustments -- $159 at College Park Cycles, College Park (864-2211).

Precor rowing machine, model 612 -- $259 at College Park Cycles, College Park (864-2211). RANGES

Tappan electric range, model 371012, 30-inch size, preheat setting, liftoff door and top -- $275 at Alco Electronics Inc., Alexandria (780-5180).

Whirlpool electric range, model RF375PXP, 30-inch size, self cleaning, black glass door with window, oven light, timer, programmable -- $539 at A & A Appliance Co. in the District (723-3315).

Caloric gas range, model RSD359, 30-inch size, self cleaning, black glass door, oven light, clock timer, waist-high broiler, storage drawer, pilotless ignition -- $650 at Alco Electronics, Alexandria (780-5180).

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