I'm with @Account Closed
I send out 350 postcards and got a big-fat-zero calls.
I sent out the same in yellow letters (hand-wrote them myself) and got zero calls.
Typed up letters on a Microsoft using Mail-Merge and simply signed my name at the bottom of each (I do this while watching TV or talking to my wife at night or listening to a podcast) and physically wrote the address on each envelope myself (also while doing something else constructive...or not so constructive) and sent out 300 letters. I got about 9 calls in the first 2 weeks. 2 were to take the off my list. Most were for bad deals. 2 were for decent deals.
This was all on the first round of mailers, too. Everyone says that the first round should be expected to have no returns, making the third and fourth mailings the better ones for good leads. So going by this, I suspect that each following round of mailing will result in me getting or getting closer to the lead that will have a payday attached.
I am brand new to this. Started actively mailing in October.
Another thing Pratik said, which I have recently learned for myself, is that a good lead list is difficult to obtain. I got mine off of Melissa Data. 10% of the names on the list are for big banks who aren't going to see my letters. Another 25-30% are repeated names. Such a waste of money.
Now I drive for dollars more and I am going to the courthouse to dig through files of probate cases and pre-foreclosures and tax liens. I'm even going to chase code violations. I don't want to mail to people that everyone else is mailing to. I also don't want to just blindly mail to people with equity or absentee owners that might want to sell, might be distressed but likely expect to sell their house for substantial profit, leaving me with no negotiating room - which as a newbie, until you get good (which I'm not) you want to have as much room to negotiate with your seller and your buyers.
Good luck man.