The purchase of much larger quantities than the usual, for a unit price that is lower than the usual. (source: http://en.wikipedia.org/wiki/Bulk_purchasing)

Person who holds, or presents for payment, a negotiable instrument (such as a check or draft) marked ‘Pay Bearer,’ ‘The Bearer,’ or other words to

A system of exchange by which goods or services are directly exchanged for other goods or services without using a medium of exchange, such as

A usual private shop or area to the rear of the main shop or establishment. (source: http://www.merriam-webster.com/dictionary/back%20shop)

A collection or group of various things or sorts.(source: thefreedictionary.com ) The product assortment is the whole collection of products that a retail store carries.

A person that buys and sells works of art.