Yeah, that's where I bought my MM Night Rider Country Gentleman cob pipe, my first ever pipe, and my daily use one. They definitely have great prices.
Only reason I was looking for a stem to fit the old one I have is I intended to clean it up nice and send it with an eventual bomb, as I'm not a fan of the yellow, very corn cob looking pipes. Just not my style, but plenty of people like them.
It's apparently either an odd shaft hole inside diameter, or the standard sizes have changed over time. It's 6.5mm I.D., and the new standard based on looking at many places, is 3mm or 9mm. Occasionally I see 10mm too.
Did find a place with a 7mm, straight and bent, that I figure I can sand down 0.5mm without effecting the integrity of the end of the stem since it's such a small amount. Planning to give it a try.
I friggin love tobacco!