BB30 50/34 Compact Crank Swap for BB30 53/39

I have a very new FSA Gossamer crankset with 50/34 chainrings, 175 mm, BB30. I would like to swap it for your 53/39 175mm BB30 crankset. I might pay you a little if yours is a better model. This crank set will only work in BB30 bikes. Pics on craigslist now. Arlo 503 997 9443