I bought the box set on RSD earlier this year. Wasn't signed but it was only like $100/150 tops. So they must think pretty highly of themselves to add an extra $500+ for the autographs.
It is the exact same box set. The lyrics and cartoons are copies. Not actually handwritten or drawn per each one. The only difference in what I got and this is it is signed on the front and a lot more money.
Definitely the way to go. I kind of felt I overpaid with what I spent on it unsigned. Was one of those in the moment impulse purchases since RSD is like a lot of things we all try to get on here. They go quick and if you hesitate they will be gone.