$75 was better than fair. They generally run for more in my area. The Rocketeer machines are very popular due to the style. The accessory box, manual, and large desk with lots of storage don't hurt in my opinion either.
You have the basic cams with the machine. There's another box just with cams that should round out your set.
The door and lid breaking off seems to be a common thing and finding a replacement door can really drive up the cost of a machine if you need one. Far better to choose a complete machine like you did.
Congrats on your new machine!
Rodney