Hey John,We have not had any issues like this happening recently.That is true, that Zillow can not post a unit for rent and for sale at the same time.I think Zillow is making some changes on the backend and that may be causing some of these issues!

As a turnkey company they have a true production line to rehab their homes. 

If it sounds to good to be true, it probably is.

This holds true for realtors, especially contractors (I want one who talks about how he is going to do the job not tell me about how awesome he is when he built this and that and this and that, they talk to much they are snake oil salespeople)

If, however, you're coming in with a very thoughtful and transparent offer showing that you and your agent are a pro who have a true reason for the offer, the seller and listing agent are much more likely to work with you.

My spider sense says this is on the "too good to be true" side of a scam vs. not a scam.

NOT TRUE.

@Shannon L Fogarty the tried and true technique here is to ask other investors in your market who they are using.  

But of course, a realtor is your friend in refining that true ARV. 

In general, it is always good to look at the taxable value every year for your property while you still own it when the tax statement comes.If you feel you can support a lower taxable value with sold comparables that are like your property nearby, then it is worth your time to try to dispute the value.It is true there is a very short timeframe to schedule a time to go in and dispute the taxable value with your local property tax assessor usually and the deadline is printed on the annual tax statement.The reality is real estate does not always go up in value.To your success!