Blue Bell and Otto Busch Pirola straights

[Mink]

I just came across ShavingShop and see that they have some NOS razors that look very nice but I don't see any reviews on them. Can anyone provide feedback on the 6/8-13/16 Blue Bell and Otto Busch Pirola 2 straight razors? I'm curious because they are older blades, in great shape, and cost considerably less than the TI Le Grelot.

Thanks