Wow, been learning a lot from the veteran smokers here, and would like to add some ideas in greater length, leider... still have deadlines to meet.
This 'pipe bubble' reminds me during my lust for interesting looking tampers from a while back, and I found from the website of this tamper sculptor that one Chinese dealer sold all of his most expensive work (highest > 1,400 USD)
http://shop62797404.taobao.com/category-495656376.htm?spm=a1z10.5-c.w4002-2616798565.8.PlKeZo&mid=w-2616798565-0&catName=%D1%B9%B0%F4%B4%F3%CA%A6Dmitri+Plechtc&catId=495656376&orderType=price_desc
I really don't know, perhaps these collectors smoke mainly freehand designer pipes.
Source (dealers of his work):
http://zapzap.blog.com/dealers/
Germans pipers are really frugal, of course occasionally you heard that there are this and that collectors who have more than a few dozen freehand designer pipes, the majority though are really happy with their 9mm-filtered Vauen, Savinelli, Stanwell, Design Berlin alike.