you have to be very careful with things like these... some are really genuine some are not...
you have to do a lot of researching and if you want why not visit one of their sites, talk to the agents, appear that you are interested, dont be shy to ask questions... listen, write all what they have said, ask for a DVD presentation etc...
But beware: do not give all your details away. Maybe just your name ang phone number but do not give all... because once they have your details, they wont stop bothering you until you say YES to them
Do not fall with any offers, do not be tempted, Think before you buy...
Research for reviews etc...
For example: in Manila (malls) ythey have very amazing showrooms but when you visit the actual site... some are not even nice...
Just be careful! Do not give any promises!
Do not be impulsive. Be sensible. Be practical