The smaller GT was only around for 2 years. It has unique plastic parts that were not used on other kits. You can clone the K-21 easily. All those things make collectors see the value of this kit differently than folks who buy kits to build and fly.

That being said, I think it's a high price and I personally wouldn't pay it. But then I'm not a collector and what folks want to spend their money on is their business.

kj