You can use the search feature on here to find similar posts discussing same, but not sure what your confusion is to buy a house: you work with a TV sales rep for TV houses with the specs you want, floor plan style, location, price range, , and you look for non TV realtor resale houses yourself by visiting open houses and working with an MLS realtor. . .
I think you might be thinking you are limited to one realtor when in a bifurcated market, you need two.
good luck
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