TTI is simply capitalizing on our throw-away society.  In fact, I can tell you with "expert" knowledge that when Wal Mart orders a number of vacuums from TTI, they bring the price point to their expectation.
For example:  
Wal Mart intends to have a vacuum cleaner at the $99 price point
Wal Mart contacts TTI and asks how much it would cost to build a vacuum they can purchase for say, $67 and sell at the $99 price point.
TTI knows that it costs maybe $74 to build the entry level T Series
TTI then adjusts the vacuum to come to Wal Mart's wholesale cost.  This could be removing a small metal part, using less screws, one less attachment, cheaper belt, etc.
The numbers in this post are entirely theoretical, I know how much I pay for an entry level T Series and the other TTI dealers on here also know, it would be unfair to reveal the actual costs.