My uncle has asked me to look for him a shopping cart that will allow people to see all the titles of his discs at once, and just click on add to cart for any of them, Any suggestions

to see his site
http://www.teleport.com/~dld/

Maybe a one time fee or some kinda of program?

I would suggest having a look at Mals-e (http://www.mals-e.com) which is Free or US $5/mth, for a more advanced Admin panel.