What location are they interested in buying? Central Pattaya, Pratumnak, Wongamat, Jomtien?
What size unit are they looking for?
Are they buying as a place to live, or for investment?
What is their budget? How much can they pay for a condo?
Do they want something that is finished already, or is it ok if it is still under construction and not finished yet?
Very important question - when do they want to look and when are they planning to buy?