As Ned stated, most mortgages have a due on sale clause, which means the entire balance is due if ownership is transferred.Secondly, if the owner has vacated the house, there's a chance he hasn't kept up with insurance payments or paid the taxes.

That has not been my experience but as @Ned Carey mentioned each bank has different internal rules.

The Gaithersburg REIA is excellent as Ned Carey mentioned (not to mention the massive REIA in Towson and BWI). 

So, contact them asn ask them why they are charging it.

As @Ned Carey said - on a volume of 100, after 1 mailing - expect NOTHING to come from that and feel pretty special if anything does.  

As Ned and Carl said, the biggest question will be whether they need to be licensed by the state in order to legally complete the work you'd be hiring them to complete.

I'm an investor and Real Estate Broker since 2003 and would love to connect with more ladies in the Washington DC Metro area as well as N.

As @Ned Carey pointed out, this varies quite a bit state to state.

As Ned said, most are not very good properties.

Even if you're taxed as n S-corp, partnership or sole proprietor.