In fact, plaster crests will break, it's simply a matter of time to the first drop. The larger badges, the ones affixed to the exterior of the ships, were normally made at Dockyard. They all reflected the skills of the maker, level of sobriety,available materials and paints. Some are fastened onto varnished mahogany mounting plaques. Some badges are very rare, and more expensive, others are still relatively easy to locate.
Prices vary with size, material, condition and availability.
Many years ago, ship's badges were available for a token amount from the ship's canteen or the maker. Many original badges from the older ships are not available anymore. Reproductions, often much better in appearance and finish, are available from a few craftsmen in Canada who continue to make badges on a custom, usually part-time basis. The craftsmen are very few in number and they are vital links in maintaining our naval heritage by ensuring a supply of ship's badges for present and future collections. The reproductions do raise the question of collectablility and this does tend to place an upper limit on the value of any badge.