you might want to present them as gifs or pngs.
jpeg might ruin the crisp lines and with gif you could set the colours to 2,4,8,16etc if you wanted
test a gif in size with limited colours and a png without alpha mapping.
if they are flash present them as a slide show in a flash module and lock it if your worried about low level theft etc.
I dont think they will sell if there is no characters to get an affinity with.
perhaps your writing the gags first then adding the characters later.
matt groening (simpsons creator) has a strip called life in hell where the characters are the same in every cell, to a minimalism.