Pretty cool old bike, a friend had new one in high school, a 73 or 74 if I remember correctly. The thing was scary fast with a poor suspension and a seat as comfortable as a 2" x 4". The engine way out performed the rest of the bike.
I'm an impulse buyer too. If I kept every bike I ever bought I'd have close to a hundred of them. Many I buy with big plans but then in moments of clarity I come to my senses and turn them over before I'm 3x upside down in them. My pockets aren't very deep and most are sold to finance the next one.....and this particular winter, to pay the bills. I make a buck here and there occasionally and am 100% guilt free, as you should be too.