This question isn't specific enough to give an answer to. It's like saying "How long is a piece of string?" Firstly, a "chest" can mean a chest of drawers or dower chest with a lift up lid. Then it depends upon age, condition, patina, skills of the craftsman who made it, originality, rarity and a number of other factors.
Antique chests are only usually sold in specialist antique stores and reclamation yards. The "Yellow Pages" relevant to one's area will list such establishments.
Artifacts and antique collections are usually old and dear. Some antique collections include chests and coins from the Victorian era.
Etsy and eBay both have some nice antique trunks and chests listed. You could also try Overstock's website, Brettuns Village or Mr. Beasley's, they all have wonder styles and prices.
Cedar chests are available in many locations, but it maybe be worth looking at Lane Furniture (www.lanefurniture.com) or Chest Works (www.chestworks.com). Ebay also has many antique cedar chests available.
Some of the styles of the antique cedar hope chests usually have a lidded blanket chest. In some traditions there may be one or two side by side drawers underneath the lid.
your buying some expensive pot
Local antique shops have classic toy chests often, but if you are in the market for a new toy chest you should look at furniture stores such as Pottery Barn or IKEA - you are likely to find what you are looking for.
You should go to an antique store and ask for an estimate. An antique store is likely to be present in your area.
There are many types of toy chests that have safety hinges, from wooden toy chests to plastic toy chests. However, the vast majority of toy chests that have safety hinges are made of molded, light plastics because the hinges don't have to support as much weight, versus wooden toy chests, which can be much heavier and don't generally use the complex safety hinges that are easily incorporated into the plastic models.
If it's in a store, you simply look at the price tag. If it's old or you don't know, you can take it to a pawn shop or store. If it's an antique you can go on a antique show and they will tell you how much your valuable antique is worth.
20.00 on e bay
You may want to reconsider selling them quickly because due to their age they may be valuable. Bringing them to an antique dealer would be advisable before deciding a price at which you will sell them at.