Well first off if you're looking at bag or sample prices at all you're going to see very high per piece costs, regardless of who you look at. Only compare by-the-case-shipped cost to be fair.
Right now, premium ABDL diapers are going on the average of rock bottom of about $1.50/pc, up close to $3/pc. (a few are higher, very few are lower) SaveExpress's MyDiaper line is probably the best "value ABDL" diaper going right now. Bambino's standard line go for around $2/pc but aren't the best in capacity so their price seems to be quite reasonable. Bellissimo and Magnifico of course go for more. I really don't see anything out of line from them.
And as others have said, they're a company. They're in business to do business, not to provide you with cheap diapers. They've got bean counters, and know how to balance their costs and their prices. There's a price curve on a graph where raising prices lowers sales and lowering prices raises sales. That curve has a maximum where price x sales is at its greatest point, and that's generally how any business sets their prices. You don't need to tell them that higher prices means fewer sales, they're very well aware of that. And they also know that if they lower prices and get increased sales. that (lower)prices x (higher)sales is going to be a smaller number. Lowering prices just won't increase sales enough to justify doing it, in the end it will cost them money. So they do the smart thing and leave it alone.
Also, $1.95 vs $2.00, I don't even see how you could possibly compare two different products and identify such a small difference in value. Maybe if you're out to say $1.50 vs $2.00, but really, arguing over a nickel in a two dollar product?