When I was a real estate agent in CA years ago agents used Zillow and other sites to drum for business. Please understand Zillow is more of a buyers lead site for real estate agents. Prices and values are highly at times falsified to get you as a buyer to click on the house that is listed on there. Once you click on the house it will be linked to an agent. You can the agent about the house in that area and it will most likely not be available. But the agent will capture your information and your interest about other homes in the area and sell you a property down the line. (BAIT AND SWITCH).
Your local MLS or Realtor.com are your best sources for general real estate information.
If something looks too good to be true it probably is. Scam? Probably/possibly. Could also be someone is entering info wrong on a website somewhere and listing a rental as a sale.
Zillow and Trulia are all horribly inaccurate anyway. Local MLS puts them on at least a 3 day delay and with the speed of the market around PS that's a big disadvantage. A good deal is not going to sit on the market for more than 3 days.
This is one of the reasons why you should get in touch with a realtor in the area. They should be able to give you access to a direct feed from the local MLS that will be much more helpful and devoid of useless info like the listings above. You don't need to sign anything with them or make an kind of commitment to see whats going on in the market.
Reach out to a few Realtors and see which one you feel most comfortable with. Remember a good agent costs the same as a bad one. It's on you to do a little shopping. With a good agent you should be able to tell them exactly what your situation is and what your needs and wants are and they will be able to use their experience to put the right properties in front of you. Makes the process of searching a whole lot easier.
No, I don't think this is a scam. As @Sandor S. says, these are rentals that are mislabeled. Sometimes a property is for sale and for rent at the same time, so there may be another Zillow listing for these properties that refer to the sale - these are clearly referring to rentals.
I know this link (as well as Andrew's) will only be good for a short time, but I'd guess that the MLS syndication for this property that Zillow picked up is (possibly) incorrectly labeling the ListingCategory.
There are other posts on BP where people have found schema translation problems form other online providers (Trulia comes to mind). Not everyone follows all the standards for IDX, RETS, etc. While realtor.com should provide the most accurate account for MLS listings, users still find errors in realtor.com... most stemming from broker data entry errors.