If you checked the full history you would see the kit came out in the 90s. The version you got was a reissue from the 2000s.
It's out of print so yeah it fetches high aftermarket prices, but buying it makes about as much sense as hunting down some crappy no-grade Gundam released decades ago when the MG variant gets released the same year. Maybe if it has some personal connection to you, it would make sense, but I don't understand buying this over the IMS at all, especially at $200 dollars today.