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 Sept. 30. 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.

30-inch, Free-standing Electric Ranges Amana ARC515, self-clean, oven window -- $809 at A&A Appliance Co., in the District (723-3315).

Frigidaire REG36A, self-clean, oven window -- $435 at Alco Electronics, Inc., Alexandria (780-5180), and Fredericksburg (703-373-1797).

General Electric JBP24GJ, self-clean -- $485 at Fulford's TV & Appliance, Rockville (762-5262).

General Electric JBP26GJ, self-clean, oven window -- $517 at J.R. Enright Co., Chevy Chase (654-1700).

Jenn-Air S120, self-clean, oven window -- $900 at all Reliable Home Appliances. Call 937-7177 for locations.

Jenn-Air S160, self-clean, oven window -- $970 at all Reliable Home Appliances. Call 937-7177 for locations.

Gas Chain Saws Husqvarna 50, 16-inch blade, 3.0-cubic-inch displacement -- $327 at Kohler Equipment, Landover Hills (577-4146) and South Potomac Lawnmowers, Fort Washington (292-4444).

Husqvarna 266XP, 20-inch blade, 3.3-cubic-inch displacement -- $510 at Kohler Equipment, Landover Hills (577-4146) and South Potomac Lawnmowers, Fort Washington (292-4444).

Stihl 012-AVEQ, 14-inch blade, 2.75-cubic-inch displacement -- $243 at Wheaton Rental Center, Kensington (933-4404).

Stihl 012-AVPEQ, 16-inch blade, 2.75-cubic-inch displacement -- $259 at Lanham Bicycle & Turf, Lanham (577-9763), and Upper Marlboro (627-2458).

Stihl 028-AVEQ, 16-inch blade, 2.9-cubic-inch displacement -- $299 at Blamer's Lawn Mower Sales, Chantilly (631-1950).

AM/FM Cassette Tape Players (Automobile) Alpine 7368, 18 station presets, auto reverse, noise reduction-dolby b/c -- $523 at Audio Associates, in Langley Park (434-4740), Laurel (953-7242), Rockville (762-3701), Arlington (525-1889), Fairfax (385-4464) and Springfield (971-1060).

Blaupunkt Lexington, 12 station presets, auto reverse, noise reduction-dolby b/c -- $449 at Greg's Auto Sound & Communications, in Rockville (251-6655), Springfield (451-9031) and Vienna (893-2236).

JVC KS-RX605, 20 station presets, auto reverse, noise reduction-dolby b -- $299 at Paul's Audio Video Center, Vienna (827-5797) and The Stereo Man, Arlington (522-5151).

Panasonic CQ-S505, auto reverse -- $110 at Auto Stereo Discounters, Fairfax (385-8817).

Sony XR-550R, 18 station presets, auto reverse -- $290 at Auto Sound Express, Suitland (420-5054) and Alexandria (549-5015).

Auto Speakers (price per pair) Cerwin Vega CS-17, 6x9-cone size in inches, 100 watts -- $170 at Auto Stereo Discounters, Fairfax (385-8817).

Infinity RS-A42, 4.0-cone size in inches, 25 watts -- $83 at Audio Associates in Langley Park (434-4740), Laurel (953-7242), Rockville (762- 3701), Arlington (525-1889), Fairfax (385-4464) and Springfield (971-1060).

Infinity RS-A693, 6x9-cone size in inches, 70 watts -- $209 at Audio Associates in Langley Park (434-4740), Laurel (953-7242), Rockville (762- 3701), Arlington (525-1889), Fairfax (385-4464) and Springfield (971-1060).

Sony XS-607, 6.5-cone size in inches, 75 watts -- $75 at Auto Sound Express, Suitland (420-5054) and Alexandria (549-5015).

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 Checkbook at (202) 347-7283.