I honestly believe that my results were a mixture of bad luck and a saturated mail list that everyone's trying to mail.  

@J Scott   I too have done well with direct mail I would never do the post card thing as its over saturated.. but I sent out 80 letters to a very tight controlled list of people.

@Shane Woods, EDDM is a great way for a small business to saturate a particular area.

When I use to buy list I always felt that they were saturated.  

I think most areas are not saturated.

Brewerytown right now is reasonably priced, but with the spill over from the Fishtown, Northern Liberties market saturating the east, treads within the last few years suggest the movement towards the west, I.E Brewerytown.

When do you see this market entering saturation?

Yes, she was lucky and has managed to keep that momentum going with airbnb but what if this bubble bursts and airbnb becomes a) over saturated or b) outlawed in her areas?

Topics/Questions: Where are the hot neighborhoods to buy and own or to rehab and flip; is the market saturated with opportunity hunters;  how long are properties on the market; average time from seeing/finding, closing, rehabbing, staging/marketing and reselling?  

If anything my impression is that if anything it would be tough only because it could be over saturated with wholesalers as I have heard many times of people moving to that area for opportunities.