The problem when buying used guns is that the selection is sometimes limited. Trends and taste change over decades and these old gun last a century or more if take care of. So like all fashions if you wait long enough anything might come back into demand. If you do not like what you see keep looking.
Short barreled gun could be sleeved if the barrels are out of proof and too thin. Then longer barrels can in effect be created. As to restocking or altering a gun stock I pass unless the gun cries out to you. Dropping major money into what is in effect is just a high dollar shooter, not a highly collectable gun, is a very poor investment unless you intend to own it for life. And for those who have never tried to restock a gun the for end is just as hard and takes just as much time as the butt stock. In fact often one with ejectors is a very major job for a professional and almost un-doable to the amateur.
