There are instances that it seems everything is okay, but when you take a look at the foundation - it’s the complete opposite and signals a disaster.How to make sure that you are not overlooking anything?

The thing attached to it on the left is the solenoid that opens and closes the valve when it is sent a signal from the controller.

In this case the why matters if you want to view this as a signal of something. 3.

$1500 on a cash purchase would signal to me on the selling side you probably have little intention of closing the deal and are likely just walking away from $1500 after tying up the property. 

However, you need to listen to the motivating signals to determine when you'll followup with them.

Incredible deal-making conference.This is what every retail needs to see in order to properly assess the viability of a prospective retail site:-Signalized corner, soft corner or mid block-Visibility, frontage and signage -Parking -Ingress/egress -Traffic counts -Population density in a 1, 3 and 5-mile radius -Ditto for median household income -Ditto for ethnic breakdown-Ditto for population growth rate -Ditto for residential and commercial development projects in the pipeline-Proximity to complementary national retailers-Proximity to direct competitors -Proximity to existing locations in the trade area -Lease structure (absolute NNN, modified NNN or NN for build to suits/reverse build to suits; or ground lease) -Rental rate -TI allowance, if any, for aforementioned BTS/Reverse BTS leases

That's a clear signal that you need to widen your search radius.

The Buyer's agent is asking me to sign all of her CAR forms.  

I would make 3 copies instead of 1 of the original and have all parties sign all 3 copies, one for you, the seller and the buyer

The ringer has to be really close to the door for it to get a signal and this sometimes can be an issue if the house is a little bigger and the ringer has to be further away for it to be heard.