I'm a patient guy and I honestly don't know how many years I've been watching eBay for an SA marked Carcano bayonet to be sold for a price I was willing to pay. At least six, I think. In those six years my willingness to pay has gone up somewhat but still not to the $400 some guys were asking. Got it for $205. Still pricy but about the going rate for a non-SA marked one.
Don't have it yet.