I’m not a realty agent and I don’t play one on TV. If you want to save $5k it seems to me your best bet is to either wait a few months for the prices to drop that far or use a discount broker up front.
Maybe it’s just me, but the only reason I can think of for asking for cash back from a broker is to hide it from your lender. If that’s the case then you are basically soliciting an agent to conspire with you to commit mortgage fraud, and I wouldn’t think Pigginton’s would be a good venue for that.
On the other hand I might be reading this all wrong. If so, I apologize profusely in advance.