Marketers use either or both to target marketing campaigns, buyers can get the inside scoop on prospective neighborhoods and anyone can have a little voyeuristic fun by virtually peering into residents' windows to learn their habits, lifestyles and behaviors.

While the names of the segments and clusters are descriptive, the behavioral details are even more so.

Based on Claritas' databases, here's a look at what people are doing in the neighborhoods of several unique eBay listings.

The residential mix is largely comprised of two extremes -- pre-middle aged, white collar executive families earning $67,800 a year and young adult households of pink and blue collar workers with a household income as low as $17,000 a year.

Higher income households contribute to Public Broadcasting System, they visit museums, shop at high-end department stores, are members of a frequent flyer program, and use housekeeping services, likely available from their lower-income neighbors. They typically own a cellular phone, a home fax machine, and use a home PC largely to surf the Web. They may have taken a beating in the stock market, but they also invest in mutual funds and money market accounts. They read the Wall Street Journal, epicurean and travel magazines and they often listen to news-talk radio.

Younger, lower-income households in the community get oil changes at the quick lube center, and some of them have had a car painted in the past 12 months. They use home hair coloring kits, shop at Montgomery Ward, use Sprint for their long distance service, subscribe to cable television, and own a portable CD player. They typically bank near work, changed residence or relocated last year, and have renter insurance.

Reading preferences include Parenting magazine and when the television's on its tuned to Dateline Friday, Fox Night at the Movies and Star Trek: Deep Space Nine.

Often rural and farming families with three or more family members, the neighbors here typically include head of household couples aged from the mid-20s to nearing retirement age. Earnings range from $30,000 to $50,000 a year.

These folks likely drive a used van or pick-up truck, and may have a motor home, camper or tractor. They are train travelers. Cats and dogs are popular pets and flea & tick products are common purchases. Wal-Mart is a popular retailer.

Pastimes include fishing, camping, hunting, horseback riding, target shooting, furniture refinishing and attending veteran's club meetings. Residents like country western music and watch nostalgia TV, home improvement programming, Tournament of Roses & Orange Bowl parades, Fox Night at the Movies, and the CBS Evening News. They also read Family Circle, Reader's Digest, Country Living, automotive, hunting and fishing magazines, romance novels.

Residents use cellular phones for business, but the household cordless often has no custom telephone calling features except for Caller ID and they are satisfied with their long distance company. Families rent videotapes from the grocery store and use the home PC for children's entertainment.

Some neighbors run a business from home and many receive primary financial advice from a banker, they have loans from a consumer finance company, and go to a teller at any branch to pay bills.

Residents here are typically older, upper income, white-collar family households with incomes ranging from $40,000 to $65,000. Fewer households are lower income blue-collar families of both retired and young adults.

The mix of residents include some who shop online each month and others who prefer to frequent the Circle K. They buy electronic games, educational VCRs videos, meal replacement shakes, ice cream and fast food.

People here likely own a garden tiller or tractor, have a motor home, use a camper, drive a pick up and own a rifle or a shotgun.

Investment portfolios include tax-sheltered annuities and pension plans and they buy credit life insurance, sign for auto loans from a bank, have furniture, appliance and electronic equipment loans from consumer finance company and receive primary financial advice from a banker. Not surprising, given their use of high interest-rate loans, they don't know how much money they need to retire comfortably.

Residents in this ZIP code can be finicky about telephone services. Some residents switched long distance company within the last year -- dropping AT&T -- and the households have a prepaid calling card and made at least one collect call in the past six months.

Popular television programming is largely family oriented, syndicated, reruns and infomercial programming including Melrose Place, Caroline in the City, General Hospital, This Old House, QVC shopping channel, the Weather Channel, Family Channel and the Disney Channel.

They read Star, Colonial Homes, Soap Opera Digest and Country Living magazines and enjoy the rodeo, cats, target shooting, fishing, hunting and strangely enough, urban contemporary format radio.