Postcard advertising a deal to cash buyers?

[Sean Dezoysa]

Postal mail can be slow and eat up time while a house is tied down. Despite that, do you guys think this is a viable way to find a cash buyer? 

Past threads have suggested using listsource or a title company to get lists of absentee/frequent cash buyers, sources that don't include phone numbers or email addresses. So I'd think on that basis of that recomendation that this works, but wanted to ask if people have actually seen success with it or not.