There are a number of British property guys operating in North Goa in and around Calangute and the “profession” seems to be in a state of flux. Deals are been set up between developers and agents to who markets what where and at what price and then realigned or reinvented by the hour. Some agents hike the prices to get back-handers sorry I mean commission from the developers - some charge you a fee - some do both.
Speak to one guy and you might find yourself followed to make sure you don’t go to another guy. Don’t sign anything.
I’m sure they are not all bad - but the real estate profession is the same the world over - be careful - caveat emptor!
My advise - if you don’t feel immediately comfortable - walk away. Agents can be useful contacts - but ensure they are working on your behalf and interest. Don’t sign anything, refuse to pay for site visits and don’t make any big decisions until you have made yourself an expert in the market for the type of property you want.
Think about approaching developers direct - many advertise on road side hoarding or in the newspapers.
Consider enlisting the help of ex-pats you meet or even your taxi driver. He will be looking for a commission from the developers - but it will be a fraction of what the property agent will be demanding.