i'm not sure about the bubblesites yet -- they're fine if you have no other website, but they're really limited -- no search facility, etc... plus they only show images that you've placed in sets - which is a painful process.

i've gone on http://cascoly.redbubble.com  to using tag searches as listing for topics - eg, peru, india, etc 

but beyond that, i thinkl RB has more potential as a slaes site and success wuill depend on getting noticed -- i have direct links throught my travel website to specific items in RB