I don't know how rare these are but I believe I saw one sell last year at the same auction I bought my LSR at. I would've loved to have gotten it but I was holding out to buy the LSR and unfortunately the bayonet went with an Arisaka Type 99 that was advertised to sell "with bayonet" as a package deal. The auctioneers didn't know one bayonet from another and so they just threw the 98k bayonet in with the Type 99 after it sold. I'm not 100% sure it was a "Grey Ghost" but I do remember the grips being very red looking.