My advice would be to get the cart set up and working the way you would like before selling anything. that way you don't sell something that you need and have replace. If you don't use the powerflow (I haven't looked to see if anyone makes a chute that will connect to the deck other than the powerflow but would love to know if there is one) then I would go on line and take a look at the parts list. You may find that the only difference between models is the housing. If the fan and pulleys are the same then it opens up the market of people who would be potential buyers. More buyers equals better chance of selling it/ more money. I'm guessing the cost of the bagger, the powerflow, and the chute is about $2k new. So less than half price seams like a good deal. If you were closer I would be interested.
I know you said you don't like the weight of the powerflow head on your deck. Is it because it adds too much weight on one side of the deck? Could you add weight on the other side of the deck to counter balance it? I ask because I can see myself with one in the near future. While my deck, 48", is smaller and shouldn't suffer as badly from having all that weight on one side of the deck I still have thought about options if needed. Having a smaller deck I have lots of adjustment in the spring to offset the weight of the deck. Adding extra weight would just mean adding more tension to the spring. I don't know if that's an option for the 60" deck as the adjuster could be at it's limit.
