Most major publishers operate according to an "agency model," in which the publisher sets the price to the consumer and ALL retailers (indies, chains, Amazon) agree to sell that e-book at that price to the consumer.
This means that most of our eBooks sell at the same price as Amazon sells them.
This also means that we cannot extend our Frequent Buyer Card discount to eBook purchases.
When books are not under an agency plan, we have priced them just a little above cost in order to build our share of this market. If you find e-book prices that are substantially below ours, that retailer is selling below its cost. Gibson's will never sell below cost for any reason.