I was drinking the other day, and thinking while drinking... There's http://www.modlab.co.uk
, there's http://www.ingenuitymicro.com/
, then there's my site which is, thankfully, not open yet, GHI creations section, and probably there's more sites where somebody sells a few hand-made Gadgeteer modules. A webshop with 1-3 modules doesn't get much attention, and, unless somebody quits his/her daytime job, those small sites will never get its product list populated.
Maybe we should all go under one hood? That should benefit everyone, I think, by both attracting customers and spreading Gadgeteer spirit. Tindie.com? Ebay?