Sending out mailers from a leads list

[Joe Ruggiero]

Hey BP, so I've officially realized after a few refusals and crazy offers that I need to take off-market deals more seriously. I have a leads list of 600 potential multi-family properties and the mailing addresses of their associated owners. My question is, what is the most efficient way to send these outs? Is it as simple as what I'm thinking and going one by one stuffing the envelopes and bringing them to the post office to mail? Is there a more efficient way? Also, anyone who has had success with this.. what did you do to drum up interest?

Thanks in advance!