I think what Joris is saying re: categories is important. It's a point I made/agreed on a long time ago.
The Browsing Concept
Browsing categories allows buyers to "window shop". A search engine does not.
When you think hard about it ... does anyone think they really *need* what we are producing here?
"I think I'll pop over to shapeways because I really do need to have a Nubilefirdinohedron in my house"
So, what are they going to search for? Browsing categories allows us to suggest to users what they might want.
"Hmm, I wonder what will happen if I click on this sculptural mathematics category ... Wow! I'd never seen a Nubilefirdinohedron before. I want one *click*".
Seller Custom Categories
At the moment, most producers here do not have expansive lists of products. But I think I'm already starting to notice my list is getting too long.
I would like to be able to guide buyers into certain directions, rather than have them hit with only my latest produced items, or whatever is at one end of a pricing scale, rating scale, alphabet scale, etc...
If I can set my own custom categories, and am able to attach as many of these categories to each product as is reasonable, then I think the buying and selling experience will be optimized.
Examples
I could set a steampunk gadgetry category for all the funky functionals I make.
I could set a cool characters category for any neat little toy figurines I have.
I could set a "SHOWCASE" category to put all the items that I feel are new, and nifty, and not getting enough attention from my buyers.
I could set a "under $10" category ... or a "$10-$20" category to highlight things that are especialy afffordable. For that matter, I could make a "Impulse Add-ons" category for those little under $3 items that help people reach the $25 buying goal.
Ultimate Control Provides Little Results
As an artist, I know that I make the best things when I have some sort of restriction that helps me to focus my intent. Each medium presents its own restriction. If I were faced with mind able to manifest anything from nothing and an empty void, I wouldn't know where to start.
So too with buyers who are faced with an empty search field.
I think allowing folks to search for price ranges is good, yes ... but please don't let it overshadow the importance of custom categories.
-Whystler