Since you are new to the buying and selling of art and art prints, most art is bought by the gallery owner at wholesale price, whatever that may be. It is marked up to a retail price (most times "Keystoned at wholesale price) and sold to the shopping public. That is part of the way a gallery owner makes his/her business thrive.
To buy an art print at wholesale and then sell it at wholesale isn't very profitable for the person who laid out their cash to buy the print in the first place. There are shipping charges to get the print to the gallery and sometimes, the print is shrinkwrapped on foamcore to display it. Many times the print stays in the gallery for months before it is sold. All of this should be added to the cost of the print in addition to the wholesale purchase in order to realize a true profit on a sale.
So, with this in mind, I will tell you that I do have some Jon Crane prints but you will have to make a better offer on them than "wholesale" before I will be able to sell them. And even then, I would have to know that you are not simply somebody who is looking for a good deal on Crane prints.
The truth is, your store name sounds more like a furniture store than an art gallery and I would be hesitant to put a s/n Jon Crane print alongside the decorator stuff displayed in most of the furniture stores I have visited.
How long have you operated "Furnish with Us"?
I have a sneaking suspicion that I have been preaching to the choir instead of trying to teach a new person to this trade how markup is handled.
Framerguy