i took this picture...well, all of them, with a 128 dollar canon camera that i bought at wal mart. 5.0 megapixels.  i could probably blow the original up to 11x14 given the original file.
post processing?  yes, but i would do the same with film or any other camera...there are just certain things that should be done for balance.  i pulled in some of the details in much the same way as i might have done with film in a darkroom.
my goal is to convert the cheap camera into a nicer camera using the proceeds from the one that i have.  a difficult goal, but not impossible...not entirely anyway.
an interesting developement...a friend of mine gave me his sony camera tonight its on loan for two weeks on the condition that i make him a print of an image that i take with the camera.  not a bad deal for the chance to experiment with slightly better point and shoot than i have.
my goal at this point is to purchase a canon 30d with proceeds from the lowend that i have.  i expect that it will broaden my perspective.   cant wait.
 
 thanks for the input alll.  it is most vital and appreciated and i trust the voices that have chimed thus far.
truly.
ive only sold one so far.  the one shown above.  
50 dollars. 
its a good start.
joy.

p.s. - as for chiaroscuro...one of my favorite painters is Caravaggio...i am sure that he has been an influence in some way.  the man was pure brilliance.