One CAN figure out approximately how much a property sold for even if it's not listed in the records:  extrapolate the transfer taxes (state/county/city) and multiply out.Just an aside:  I remember back in the day when the appraisals were coming in short in an appreciating market (something like we have today) we would ask the buyer to pay MORE money for the transfer taxes (no law about not paying more taxes) and it would help show a higher "sales" price and help 'push' up the comps--not recommending you do that now--much more data available for all eyes.But I would recommend that you buddy up with a like-minded realtor, and work out a mutually beneficial arrangement so you can get the info you need, and they can get listings, sales, referrals, etc, that they need.Better yet, get licensed yourself and get to know the business from the inside out!

My deadline to close on the property is July 10th (Two weeks) and the owner said he has a cash buyer lined up.

accommodate a buyer's request for detailed rental and financial history, when selling only a small segment of your overall portfolio?

This makes the selling price $300k higher than the numbers you would get from calculating the price based on a potential buyer's expenses.

( I assume there will be an appraisal in there somewhere or again, only the buyer gets burnt if your guesstimate at final value is wrong.)Should the end buyer pay half of of what the net would be?

When it comes to wholesaling, what sort of criteria are cash buyers looking for?  

Not familiar with PA contracts but I’ve never seen a requirement where the buyer Had to supply even inspection reports, let alone appraisals unless there was s appraisal clause you were taking advantage of.

Most of the multi families I’ve lost this past year have been to cash buyers and over asking price.

Buyers then bought at the edge of their income and when rates adjusted higher the mortgage became more then they could bear.

There'a  broad based economy, lots of qualified buyers, perfect weather, and so many positive things.