When i got my Zed,i paid a deposit to the guy on the day of the test drive,and then the following weekend i took a trip down there with over 10k in cash. Was a faff to get it out the bank,as they wanted a few days notice to sort the money out. My partner was abit worried,as you would be,but at the end of the day,its there in solid state,and can be counted and sorted there and then. Its up to you if you feel happy doing that. Id avoid bankers drafts etc,as heard a few stories about them,fraud etc.