Don’t commit to buying through him / her. Let them know that you have found them helpful so far and that you are interested, but that you will speak to a number of agents / industry experts as part of you due diligence before reserving. (Reservation deposits are often fully refundable for a short period, but you don’t want the hassle of getting them re-imbursed if you don’t proceed after performing your due diligence checks. Have heard stories about people waiting months to be re-imbursed.)
Industry experts you can consult are other agents, tax experts, solicitors, more experienced investors, etc. I don’t class myself as an expert on off-plan investments, but I do have 3 at the moment (in Morocco) and am happy talking if you would like to get in touch. (You can try PM on this forum – though there may be a minimum number of posts required (perhaps 5 or so) before administrator will switch your PM function on.)
Types of things to think about are:
1) What is included in purchase price (and in time firming that up in contract when you are negotiating the details.)
2) What could obscure your views. (If you have sea view then can land in front be built on? If it can’t what evidence is there of that? Can agent provide it? (It is in their interests to if land in front can not be developed.) Think about stipulating that garbage collection point and power generators are not in sight of your property nor are they within Xm. (Plans don’t always show where these are and you don’t want them popping up next to your property.)
3) What are the advantages of going through them?
4) What do they think about agent X that you have been in touch with? (If they bad mouth the competition then I wouldn’t be interested – shows what they are like.)
5) Consider talking to an agent that operates in the area but doesn’t offer this development. They will tell you any reasons they know of not to invest there. (Agents promoting that development won’t, it simply isn’t in their interests to do so.)