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 April 30. 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: VIDEO CASSETTE RECORDERS

*Toshiba video cassette recorder, model M-5400, VHS format, 117-channel cable compatible, electronic tuning, 7-day/4-event timer, remote control -- $333 at Twinbrook TV, Inc., Rockville (424-8111).

*Sony video cassette recorder, model SL-HF400, super beta hi-fi format, 118-channel cable compatible, quartz tuning, 7-day/6-event timer, remote control, stereo broadcast reception -- $488 at Murrell's Television, Inc. the District (338-7730).

*Sony camera/recorder, model CCD-V8AFU, 8mm format, auto focus -- $1,370 at Paul's Audio Video Center, Vienna (827-5797) and The Stereo Man, Arlington (522-5151). AUTOMOBILE AM/FM CASSETTE PLAYERS

*Sony auto AM/FM cassette player, model XR20, auto reverse -- $100 at Auto Stereo Discounters, Fairfax (385-2886).

*Blaupunkt auto AM/FM cassette player, model Aspen, auto reverse, noise reduction, digital, 12 programmable station presets -- $269 at Greg's Auto Sound & Communications, Vienna (893-2236), Springfield (451-9031).

*Sony auto AM/FM cassette player, model XR80, auto reverse, noise reduction, digital, 18 programmable station presets -- $397 at Auto Sound Electronics, Fairfax (385-2886). AUTOMOBILE SPEAKERS

*Kenwood auto speakers, model KFC5050, 5" linear plane midrange/woofer, 100 watts, per pair -- $100 at Auto Sound Electronics, Fairfax (385-2886).

*Alpine auto speakers, model 6293, 6"x9" coaxial 2-way speaker system, 100 watts, per pair -- $126 at Audio Associates, Laurel (953-7242), Langley Park (434-4740), Arlington (525-1889), Rockville (762-3701), Springfield (971-1060). COMPUTERS

*Sanyo computer, model MBC555-2, 256K, 2 360K drives, no monitor -- $999 at North's Office Machines in the District (466-2000).

*IBM computer, model PC, 256K, 2 360K drives, IBM monochrome monitor -- $1,501 at Frederick Computer Products, Frederick (694-8884).

*Zenith computer, model Z-158, 256K, 2 360K drives, Zenith mono monitor -- $1,988 at Peoples Computer, Arlington (522-3900). COMPUTER SOFTWARE

*PFS software, model Write, 5 1/4" disk, IBM format -- $84 at Frederick Computer Products, Frederick (694-8884).

*Multimate software, model 3.31, 5 1/4" disk, IBM format -- $219 at Advanced Computer Concept, Rosslyn (276-7800).

*Micropro software, model Wordstar 2000, 5 1/4" disk, IBM format -- $249 at Operant Systems, Langley Park (434-0405). BICYCLES

*Schwinn 10-speed bicycle, model World -- $185 at Chevy Chase Bicycle in the District (966-2705).

*Ross 12-speed bicycle, model Signature 290 -- $205 at Metropolis Bike & Scooter in the District (543-8900).

*Fuji 12-speed, model Espree -- $289 at Big Wheel Bikes in the District (337-0254), (638-3301), or (543-1600), Bethesda (652-0192), Oakton (938-8889).

If you feel a retailer has not met its commitments, Checkbook's editors would like to know. Write: Checkbook, 806 15th St. NW, Washington, D.C. 20005.