Jon, I agree completely. I don't make a lot off my grill rehabs. I would be way better off taking a part time job at minimum wage. But, like you, I consider it more of a hobby and one that in the end, doesn't cost money.
I am not sure what your personal grill is, but if it is a Genesis 1000-5000 or older Silver B or C, it is quite possible that you can swap that maroon lid with the original. If you want to get an idea what you can sell your rehabbed grills for, just go on Craigslist and/or Facebook and see what people are selling "uncleaned" grills for. With a well rehabbed grill with everything working and in good order, you can get $200+ for a Genny 1000 or Silver B easily.