I have an IMP & an AND. There is a real reason for the difference in price.
Douglas, care to expand on that a bit? Is it mainly the matter of the tendons and connectors? I think the screw-in types on the AND pipes are their big weak point. I had one pipe where the connector wanted to come out of the shank much more easily than the stem wanted to unscrew from the shank, which was a major nuisance. Or are you talking about the quality of the meer? Or all round?
I've just put in an order for an IMP that I saw going quite cheap on the FleaBay. I've never heard anything more than a few cautioning mutters about "the trader on eBay", but I'm going to try it with my usual online purchase attitude with vendors I've never dealt with before: it's a bit of a poker game, you might walk away with empty pockets. I must say, I've been buying stuff on eBay for years now (panama hats, fountain pens, old magazines) and I've really only ever had one disastrous purchase. I think I'm still ahead.
I asked a question the other day about quality of meerschaum. I had an interesting chat with Ahmet Govem about this, when he quoted me a higher price for a smooth-surfaced pipe than for an ornamented one. I was curious: I would have thought ornamented would have been more work. He said that smooth pipes generally require a higher grade of block meerschaum than ornamented ones, where the carver can hide imperfections. For me, while I like a nice looking pipe as much as the next person, I'm mostly concerned with smoking quality. I'm not sure if the difference in quality of the block has any impact on that. In general, though, when craftsmen use higher quality materials, they put in more effort to making sure the whole thing is good, perhaps because the margins are a bit higher.