I think your crazy
I think your crazy! The BMW will still be worth what you have in it ten year from now, probably more. Hell in ten year you or whoever gets your bike will still be riding it or have restored it and have a great classic bike to show off. If you want the Harley, find a used one the prices are down right now, buy it. Keep the airhead you will be sorry later if you get rid of the R bike. I've had 6 airheads and I gotten rid of 4 of them over the years. Guess what, wish I had them all back right now!