It all comes down to one thing, the seller. Some sellers are very flexible and they leave it to the brokers to decide (in this case, seller is just tired of the business and wants to be done with it asap.) And some sellers are just very tight lipped and want everything to go through them (in this case, things can get little crazy and you can lose some good credible buyers.)
That being said, I would say it is a mix of a judgement call and a signed CA. Keep in mind that if buyer/s has ill intentions (and some do), they will go around you and do whatever. Realistically, most of the CA/s are not even enforceable as people believe they are.
Aug 4, 2014