I am in a very similar situation with an artist. What we are going to do is create a simple access database that will hold his artwork and a few details and create an admin page from asp which will allow him to manage the content. We are then going to use Candy Press ecommerce software to sell his art online.
I don't know what your experience level is in asp but it is not hard to learn. There are some
very user friendly dreamweaver tutorials to do everything I just talked about at
http://www.webthang.co.uk
The Candy Press ecommerce software is very robust and is only $50.