Some sellers are happy for you to take the gun away and shoot it, inspect it and consider it. Others happy to let you shot it but only in their sight. Some are unhappy to let it leave the shop unless it is sold.
I recently went at the request of a client to inspect a pair of guns at the Beretta Gallery in London and they told me they would not allow independent inspection (said it was 'insulting' -either the buyer trusted them and bought from them or he could go elsewhere. I advised him to do just that and he did.
