Another reason for no callbacks is that the agents don’t want to work that hard – it’s not easy building a case for why the seller should consider a lowball offer, and worse than that is they think the listing agent might not like them for insulting the sellers.
Agents on both sides need to toughen up – buyers are just trying to do what’s best for them, nobody should take it personal. With the advent of electronic signatures, it wouldn’t take days to figure out if the seller is a player, or a hold-out.
If you need an agent to make those kinds of offers and back them up with a compelling case as to why the seller should consider them strongly, then contact me or Adam – either one of us will be happy to assist you.