Niche market

A niche market is the subset of the market on which a specific product is focusing on; Therefore the market niche defines the specific product features aimed at satisfying specific market needs, as well as the price range, production quality and the demographics that is intended to impact.
Every single product that is on sale can be defined by its niche market. As of special note, the products aimed at a wide demographics audience, with the resulting low price (due to Price elasticity of demand), are said to belong to the Mainstream niche, in practice referred only as Mainstream or of high demand. Narrowed demographics though lead to elevated price because of the same principles.
In practice, product vendors and trade businesses are commonly referred as mainstream providers or narrow demographics niche market providers (colloquially shortened to just niche market providers). Small capital providers usually opt for a niche market with narrow demographics as a measure of increasing their gain margins.
Nevertheless, the final product quality (low or high) is not dependant on the price elasticity of demand though, it is more associated with the specific needs that the product is aimed at satisfy and in some cases with brand recognition which the vendor wants to be associated with (i.e Prestige, Practicability, Money saving, Expensiveness, Planet environment conscience, Power, etc
REFERENCE:http://en.wikipedia.org/wiki/Niche_market

MY OPINION:Marketing strategy whereby marketers devote 100% of their efforts toward a small segment of a market instead of the whole market. There are several different niche marketing strategies: end user strategy, serving only one type of end user customer; vertical level strategy, specializing in one level of the production-distribution cycle; customer size strategy, selling products designed for only one size customer, such as petite or extra large clothes; service strategy, offering a service not available from any other company; and geographic strategy, selling only in one geographic area..