@Steel Charlie nailed it for looking for a used one. Nearly every bike I have has a Brooks saddle, ether a Pro or a Swallow, all used. Never bought one new. The key is if it looks great but has "dimples" in representing the sit bones of the previous owner, you may not match and it may not be as comfortable. I don't know what that is like as all mine were still "straight" and conformed to my sit bones.
Professionals are a lot stiffer than say the Swallow. Both have been around for a lot of decades.