If the cost of stamps is what's interfering in your marketing, you have a budget problem.I would work on refining your list by segmenting into A, B and C prospects. 

Hey BP,I'm starting to narrow down my search to specific neighborhoods and I think that I'm looking now at Federal Hill, South Baltimore, and Riverside Park.  

I have always been one to prefer to do thing right from the beginning rather than using temporary band aid solutions.

I have heard somewhere that some people use listsourse.com to find developers using certain fields to narrow it down but I have NO IDEA how that works.

Yes, I just purchased the list of every parcel in the county, some of them let you narrow it down by "absentee owner," etc.I spend a total of about $200 getting the complete lists from 9 nearby counties, which is over 400,000 absentee owners, I believe.A lot better than the over $1,000 Listsource wants for 1,500 leads.

You wrote: "in Oregon you as the buyer must wire your own funds into escrow.. you cannot use the C buyers funds to close A and B makes the delta".Isn't the job of a Transactional Lender "B" to make sure that the person/entity on the Contract actually closes with that Lender's money (ie. the Seller "A" gets their money regardless of a Wholesaler's inability to close themselves), so that Buyer "C" pays out the Transactional Lender "B" and has nothing to do with the original Seller?

Also if you have narrowed from them they will probably charge you more points up front.

Have you narrowed down what your criteria or focus will be?

Is there a good number or percentage to use before you've had a chance to see the property as kind of a rule of thumb in order to narrow down properties relatively safely but not eliminate properties with potential?

@Ramaiyer Ramesh, think of it as a funnel that gets narrower the further you go in.