Crows and Loafing Shed

In the vernacular, a shed used to shelter livestock from inclement weather, and to which they have full-time access (as opposed to a barn, where they are either shut in or shut out), is called a loafing shed.  I guess, for cattle, loafing is not only permitted, it's expected.  Below is my depiction of the loafing shed that was on our farm in Granville, Ohio, in the 1960's.

"Crows and Shed", original watercolor on paper, 5" x 7", matted and signed.

What's the Worst That Could Happen?

I have decided to try to sell some of my pictures on eBay. 

Here is a sample:

The complete listing is here.

What's the worst that could happen?  Feedback would be greatly appreciated.