Sort of off-topic, but a lot of listers use FRSes. The price is good through 8/24/03. The usual disclaimers.

Full-power RadioShack FRS 2-way radios with silent vibrating alert. All 14 FRS channels and 38 quiet codes. Headset ready. #21-1864,
regularly 69.99 per pair. Now $19.99 per pair, or about 17 Euros. Each one uses 4 AAA cells.