Once I have created some nice looking images for jury, what
happens when that particular piece sells before it is juried?
What happens is that you have some money in your pocket ! But
seriously, as long as the image remains representative of your
current work, you may continue to use it -- as long as the piece was
made within any time period specified by a show prospectus (some
shows require that jury slides depict work made within the last year
or whatever). Most jewelers I know, however, put together a set of
slides which they use for about a year and then they shoot a new set.