I finally finished this thread and felt like adding one additional piece of value to help improve the campaigns of the other experts out their I have learned from on this. I am just starting the lead gen process in real estate but manage about $500k/month in online adspend on Google, Bing, etc.
I am not an expert on DM yet, but I have several customers whom we have implemented complimentary remarketing campaigns to supplement their additional touches on Motivated sellers that take action. You have to have at least a few hundred emails, phone numbers or website visitors, but if you do, you can setup remarketing campaigns on facebook and also on Google to carry your message forward online much less expensively than the post cards. Does that mean you shouldn't do the postcards? Absolutely not, keep mailing those suckers, but in the 30 days in between mailings you could be touching people that have interacted with you on a daily basis for Pennies. If you already have DM nailed, unless 90% of your buys are from 65+ then it's a great way to go. If they don't have a computer, you can pretty much ignore my existence or anything I post in for the next 3 or 4 months until I nail down some offline funnel chops.
I might as well ad a point about DM vs just doing online. We are experts and I am still focusing on setting up DM 1st. Why? Because we have done lead gen in other markets like title loans (read other motivated customers), and when someone is motivated enough to take their own action, go online and find a solution, they go big. They will go to goggle search "sell my house in **** fast" and fill out the form on the 1st 5 or 6 websites they see ads for. You will get that lead, but so will 6 other companies, many of which have excellent marketing systems setup to close that lead. Competition means your offered price may need to be higher. I am hoping that when someone calls of a DM piece there is a much higher chance of having the lead to yourself. Maybe other mailers know about the absentee, but they don't know he is motivated today unless he calls them too. I doubt most absentee's save up all their we buy houses letters so you may have the only one around. When that same motivated person goes online everyone who gets that lead knows they are motivated.
Bottom line, I think the other DM's will agree with me. I would pay 8x the cost for an exclusive motivated lead vs. a motivated lead with 4 seasoned cash buyers aware he has been activated. The deal you will get will more than offset additional cost. Someone tell me if I am off here? That doesn't mean I won't be advertising online. I'd be an idiot not to. Thank you for all the great information. In particular your list filter settings, the right list was my main focus.