With refoamed woofers, all of them, to be like new and working tweeters and mids these expensive when new speakers might find a home for under half of list price. Norman is not really a highly sought after brand as they made great stuff but it wasn't everywhere and these are a special top of the line speaker. I'm guessing 5-800 would be a good price but without hearing them, I can't say if they are worth that much. There are a pile of speakers out there that sell in that range, everything from name brand monkey coffins to well respected, highly reviewed brands like Dahlquist, Infinity, Vandersteen and Magneplanar.
I don't know what mid and tweeter these have and expect the woofers to be the typical late Norman poly-coned woofers. With the tweeters in these, they look like they should be a good bit better at extreme highs compared to the Philips tweeters they used in a lot of their other speakers. A friend has a pair of the 10Bs dual tweets, dual woofers and freshly refoamed and recapped. They sound good and will party all day long. I expect the same from these 12Bs with better sound.