I found one NIB - what’s a realistic value?
Hard to say. Prices for SeberTools seem to be a bit all over the place at the moment.
M2 and M3s seem cheaper than the M4, and the Craftsman 45505 (a relabelled M4) was making crazy high prices a while back, like around U$ 100 !!!! (but has since settled down a bit)
babola: "Enjoy your tools and don't be afraid to air your opinion and feelings here, but do it in courteous and respectable way toward others, of course."