if it is vacant that may be a bad idea....either the postman may know nobody lives (since they are there daily)there and leave a note or may not deliver it if its a package???im not 100% sure but seems risky??
im sure some sources use credit cards but would you want your info staying with them in there past transactions in there payment history incase they get popped? if my source offered me to pay by credit card i would probally take my business elsewhere to someone who is just as concerned as safety as profit