We have rented a few villas over the years and we are in the process of booking one for this December. This is the first time someone has asked for so much up front- usually it is $300-$400- this time they want $620 and it is my understanding the security deposit is $600 of which we will get that back 21 days after our villa rental- again I don't think we have ever paid more than $300 for a security deposit. They are charging double the security deposit because we are there for 2 weeks........