Ding ding ding..we have a winner!
The actual manufacturing cost of an SACD is three times the same process for a CD, or about $1.50. The artist and technical production costs for a classical recording range between $20,000 to above $100,000 depending on the size of the group, and their royalty structure. Distribution eats up about 2/3 the selling price, leaving little margin for the label. When you sell hundreds of thousands of CD/SACD's, that's still big money. When the average classical music SACD sells less than 2,000, that's called barely break even.
The major labels, early in the life of SACD, decided that the fast track to getting SACD to replace CD was to go single inventory hybrid, and price it the same as a CD. Then those bright guys quit the game. What's left is a bunch of independent labels who produce very high quality recordings in multiple listening formats, trapped in an untenable pricing structure, selling low/no margin SACD's into a CD market. More than 85% of SACD's sold are played as CD's.
Enter downloads. There are fixed and variable costs, and NO deep pockets. At current download volumes (iTunes and HDTracks excepted), it costs about $12 per download to cover the fixed costs. You add customer support, and you wouldn't believe the amount that's required, the cost is even higher. None of those costs include amortization of the original production costs, or additional royalties to be paid per download. The only thing that will lower the price of all downloads is volume.
The download business is the logical savior for independent labels (trapped in a media whose price can't be changed, with features that the majority of purchasers don't want/use), to continue producing and marketing fine recordings. To be successful requires the high end audio community to be supportive, and buy the stuff!