Cheap Jewelry armoires are made differently than jewelry armoires. They are the height of a person with doors opening to a set of drawers that you would keep your jewelry in. Generally people keep their regular jewelry in them so they are not built as well as jewelry armoires. The top of some of the cheap Jewelry armoires opens up to expose an open area, to keep from opening the drawers for regularly used items
Cheap Jewelry armoires are built a little flimsier than the rest to keep the cost down. Locks are generally not provided; the finish though nice is not expensive. Cheap Jewelry Armoires are not built to last as long as the regular ones. Particle board may be used instead of real wood and cheaper hinges and latches may have been used.
Your dealer would have these available to buy at a very reasonable cost to you.