Asking seller's agent to find me different property as my agent?

[Will Clift]

Hi, I'm a prospective first time home-buyer (please forgive my ignorance) looking to house-hack;  I recently visited an open house, liked the house, and really liked the ideas that the seller's agent had on how I could cash flow the place. I can tell that he's a guy that I'd like to work with in the future. The problem is I'm worried about buying this house from him because he has a fiduciary duty to get his client the highest price; but would it be proper/common to ask him if he'd be willing to find other properties for me and act as my real estate agent in a buying position?