People in busines usually buy more than those retail buyers. So, "whole sale' implies to purchase in quantity at lower price. In General, it means lower prices.

"wholesale" is the resale (sale without transformation) of new and used goods to retailers, to industrial, commercial, institutional or professional users, or to other wholesalers, or involves acting as an agent or broker in buying merchandise for, or selling merchandise to, such persons or companies. Wholesalers frequently physically assemble, sort and grade goods in large lots, break bulk, repack and redistribute in smaller lots. While wholesalers of most products usually operate from independent premises. cowboy...

It is the title of a book. It is a play on another title called, "I can get it for you wholesale". In the book Quail goes to "get" some new memories. You'' have to read the book. http://en.wikipedia.org/wiki/We_Can_Remember_It_for_You_Wholesale

To me, "We Can Remember It for You Wholesale" does not make sense. Does not sound like correct English to me.