Facebook - Buy/Sell Pages.

Whenever i've browsed on these pages for any location they look really active. Does anyone on here use these pages to offer services to people? Would be interesting to see if it's paid off for others before delving into it. Got a few ideas in mind

Obviously there's thousands of these pages. I.E Buy/Sell Liverpool, Manchester, London, Chester, New York and so on. I've been thinking of offering services on as many of these pages as possible. Surely people will bite depending on what you're offering? Offer them a cheap website, and refer them to Hostgator or charge them a set price on your Reseller hosting. Endless amount of ideas!