Wow ! I wish we had a crystal shop like that here. All of the metaphysical shops in town just have small crystals, and very mainstream crystals, which is why I thought maybe I would sell larger pieces from importing.
I sometimes browse around at crystals on ebay, but I like to be realistic about things. Usually I only look at things under $ 1000, ( or maybe items slightly more I think I can barter ) because realistically I wouldn't want to spend more than that on an item, and once I start looking, there is a good chance I end up with that in my collection
Sure sometimes it's nice to look at specimens that are 70,000 dollars for fun, but never would I spend that much, in fact I have purchased some really huge impressive crystals for only a couple hundred.
Personally I think crystals are a good investment, they don't break or wear out like other products, heck I think most would even survive a fire !