What Will speaks of happens daily, if not by all reo agents/broker, at by least 99% of them. Whether it's called a pocket listings or not!
Asset managers, banks, all of the "powers to be" are aware it. And, it must be working out for their individual best interests, because you rarely see change in the reo kings/queens.
In reference to highest & best, often times you will be bidding against yourself. It is a very powerful tool for the seller to use on those that are inexperienced, unsure about themselves/offer or just because. H&B is all about getting more, especially when there are multiple buyers.
Quick story, online bidding platform has property for 98 days, no offers. My buyer ask me to make an offer. On Sunday, during the Super Bowl, I submit an offer. On Monday, an automatic email says the seller has received multiple offers, please have buyer submit H&B. My buyer stays at current offer. Property available for sale on the 105th day. What happened to the multiple offers? Not one was acceptable? Could be, but not likely.(IMO).