Picking the way your work will be displayed and how you will be selling it is probably more important than the work itself, it will place it in the context that you think it deserves. Advice form a guy like Eric should not be taken lightly, your photography should be top notch and will be the difference between offering something for sale and actually selling something. If you are selling online consider etsy, and if you are serious about this consider Bigcartel. Other artists use both and in my opinion command more respect than ebay.
If you want your work to be taken seriously as a significant art endeavor you need to take it seriously from your selection of materials to the presentation and display. If you take it seriously then you can command a price accordingly. If you are selling a craft you can ask a craft price, if you are selling art then you can command a hefty premium.
As far as selling originals, one of the few i am aware of that works exclusively in tessellation is Joel cooper, you can check out his ETSY page here:http://www.etsy.com/shop/origamijoel?se ... d=11054204
and if you want to check out 2 guys that are doing big time paper art, check out Simon Schubert and Peter Callesen. Both of them have gallery representation and command significant prices for their work (well deserved in my opinion)