Apple is sitting on piles of cash overseas, that is invested in conservative investments.

The fact that they would respond with anything other than "YES" or "BAFO because of multiple offers" is beyond me.You gave the seller an inch of rope and now they're trying to strangle you with the whole darn thing -- I would say you are comfortable with the offer you gave at the terms enclosed.The why is sort of irrelevant, they obviously have something in mind but if you put a property on the market and someone offers you more than asking, as my old English teacher would say, "shut up and take your apples."

We have 2.4% unemployment. 1 br 1 bath condo near Apple is selling for 1.1M, 2 br, 1100 sf for $2.5M. 

Obviously there are several issues at play here, as not everything is a true apples-to-apples comparison and it's quite possible that many of these units are rented to family or long term renters, but the discrepancies are off by often $700-1200/mo. 

That may be the monthly rent for houses and apartments in the area which would not be comparing apples to apples.

It's hard to get good apples-to-apples comparisons.So, for your question about whether $200/door is reasonable, it's hard to know without more information.  

For those who don't accept prepayment, all other tenant screening considerations aside (so it's apples to apples, no criminal history, etc.) my view is that one risk item (non-payment) is removed from the rental equation.

Appfolio is like Apple and PropertyWare is like a PC. 

It skews it a little bit when you are comparing apples to oranges due to future expected maintenance costs. 

Apples to apples if the same condo that is warrantable is selling for 500k I'm thinking this should be 470k - 475k.