Buecker gambit 3..Nf6

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Prest1g3

The critical move is obviously 3..bxb4, which i dont mind playing against. However, i have some trouble with 3..nf6 (most common move played against me thus far), im just not sure what to do with my b pawn. I was hoping someone here would have some experience in similar positions they get from maybe a polish or reti opening.