When looking at prices in retrospect, remember that MP-01 did not come with a trailer so you were getting more with MP-10. Then again, they may have priced it lower knowing that they were going to reuse the mold over and over for all the repaints.
The description above shows that this version has a lot more in it than MP-10 did, much more than MP-01. Does it justify the price tag? Probably not. That is an obscene amount of money for what is effectively a toy. However, even if it is a toy there is a passionate fan base and a lot of collectors (myself included) just must have them all. I will no doubt pre-order one but will be annoyed if when I obtain it I feel that it was not worth near the price I paid.