My Very First Mailer Campaign - HELP!!!

[Pedro Pavon]

I'm about to send my very first direct mail campaign and I just want to make sure this goes out as best as it can. I've been trying to get this ball rolling for months but I've been very reluctant since I tend to overthink everything and feel like my money won't get put to good use if I don't make sure this is damn near perfect.

Anyway, I know some may be terribly bored of reading or even responding to this topic but but I can't seem to find the answer I'm looking for on BP and I also wanted an updated answer. I'm this far now where I've already purchased my list (generated 2,145 leads), but all I need now is to mail the leads from the list. My goal is to wholesale and I'm looking for a short and sweet message to get over to the potential seller. 

I plan on using Yellow Letters postcards unless someone has had better experience using a different method, I'm open to ideas. I did the math for cost and concluded printing and mailing myself will cost more than using the website.

I'd extremely appreciate everyones help on this topic. I gotta make some moneeee!