#Marketing-Pricing-Strategy:

4 pricing strategies that increase consumer spending (#Marketing-Pricing-Strategy):
(1) PRESTIGE / PREMIUM: Expensive = Superior concept
(2) LOSS LEADER: Luring consumers into store with low price products as bait.
(3) BUNDLING: Creating a false sense of "added value"
(4) DECOYS: Differently priced product range. Perceived (not actual) discount. 

From the link: http://ca.finance.yahoo.com/news/4-pricing-strategies-increase-spending-171759635.html