In some instances, it is all about speed and timing.

For instance, most people buy off MLS or list price but more experienced investors can get better deals based on their market connections to acquire properties below list price. 

For instance, a few years down the line, you can decide to sell 2 units (2 SFRs or 1 duplex).

For instance, if the property is located in an area that has predominately colder weather, having a pool and club house maybe isn't a high selling point for a potential renter. 

For something more important, like in this instance, I'd also snail mail a letter.

For instance, I am meeting a realtor and Inspector at a home today that one of our current clients has put an offer on.

For instance, if Partner 1&2 are newbie investors but can not find deals, then Partner 3 will be in a position to demand better terms because s/he is teaching them the ropes and introducing them to a network, or vice-versa. 

Oh and T12 in this instance is the Trailing 12 months actual expenses from the seller, hard to come by sometimes, but for larger properties, it should be as simple as contacting the accounting dept.  

CBRE, for instance is one that we all see.

You could return to the seller and offer a change in terms, for instance maybe a % of owner financing.