but as has been mentioned, I thought Lordsandy's pieces were the real deal and not just dummy guns.
If they're the real deal (as in live firing machine guns) then he's asking the wrong forum about prices. I don't think too many people around here have a Class III firearm permit.
Dummy guns are still real, just deactivated and rebuilt using replica receivers.
I was wondering this exact thing as of late considering I too have a real IMA MG34 with dummy receiver. I've shopped around seeing them for the 2-3k range. I guess locally as MrSparke has mentioned they can be had cheaper, but online enmasse it seems to be a minimum of 2k for a MG34.
At times like this... I wish I lived in the US.