Direct mail Postcards or Letters

[Steven Paul]

Hello all, I will be doing my first direct mail campaign in a week and i will be buying land. I have two formats for my campaign, a letter and a postcard. They are both drafted up and ready to go. I was just wondering which one you guys have found the most success with a letter or a postcard. As i will be sending out 500 copies that will cost around $200 i want to get the most responses for my money. Thank you in advance