Rent to own listings

I've noticed a lot more rent-to-own listings on Craigslist postings up here in Snohomish County. They've typically been pretty run-down houses that had trouble selling.
The interesting thing now is that it looks like builders are getting in on this.
For example: http://seattle.craigslist.org/sno/apa/500201352.html
My favorite part of the listing: "As for the sales price, we simply take today's already reduced sales price and add $10,000 for each year you occupy the home! That is unheard of. That pricing is actually below the rate of inflation!
The interesting thing now is that it looks like builders are getting in on this.
For example: http://seattle.craigslist.org/sno/apa/500201352.html
My favorite part of the listing: "As for the sales price, we simply take today's already reduced sales price and add $10,000 for each year you occupy the home! That is unheard of. That pricing is actually below the rate of inflation!