Mainly because the house is over priced, has some huge defect that wouldn't go well via a listed sale.There's other more viable creative financing means to control property than to comb for the needle in the haystack looking for sellers willing to finance.But here's a good tip.  

It is a needle in a haystack that is 1,000 miles away from you.

Pretty high entry barrier so with some sweat equity and digging for that needle in the haystack, there is opportunity to really force some appreciation in this Portland area market.

Everyone is looking for "A" class properties that cash flow and typically those are a needle in a hay stack especially in the real estate markets of today.

Sure one in a thousand an investor will get lucky and find a property today at vintage pricing of years ago.Don't ask a broker or agent to spend hundreds of hours or more to look a needle in a haystack.

That was a brilliant deal but it like finding a needle in a haystack.  

I've made a career of finding needles in haystacks on a serial basis.

This is because a substantial proportion of those coming in illegally would then be criminals whereas now the criminals are needles in the haystacks.

Its a needle in a haystack.

However looking for a market that will double in 12 months as an investment criteria is somewhat unrealistic, its like looking for a needle in a hay stack filed with rattle snakes.