It's not a bad deal but not as good as it looks at first sight. If it had an Eickhorn crossguard it would have been a great deal. From the pictures it looks like an early generic crossguard. It's safe to say that this is a parts-dagger that consists of original parts (mostly Eickhorn).
As Danny said the crossguard is an early Generic Type-1 even the hanger clips are miss matched !
So all the parts are original but built together? Would you go for the deal at this price
I would not buy a parts dagger at any price. Why would you want a parts dagger, hopefully not to disassemble it to create more parts daggers.