Each of these companies is largely Web-based and has listings that cover the world. See the FAQ sections for sample agreement forms that members use to outline the terms of their trade.
Intervac The oldest and best-known house-swap outfit, Intervac was founded in 1953 by Dutch and Swiss teachers' unions to facilitate temporary out-of-town housing for members. Twice a year the company publishes two regional catalogues that go to members for $100 a copy. Average number of listings: 10,000. 800/756-4663; www.intervacus.com; annual fee $70.
Homeexchange.com This site offers the most exhaustive guidance for would-be swappers. Average number of listings: 6,500. 800/877-8723; annual fee $50.
Homelink International Homelink also produces a directory of offerings that members receive two times a year for $45. Average number of listings: 14,000. 800/638-3841; www.homelink.org; annual fee $75.
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