Most people expect indie comics to charge more than regulars. $4 for Sound Waves given it is only 16 pages is considered just fine. It's because of production costs. Adding to this is that you can add pages to your comic without really increasing the price. There are ways to lower productions costs, such as certain Chinese printers who will give you 1K copies for 50 cents each. But you will never do as well as a company that owns their own printing press. Like, oh, Marvel and DC.
Despite having a huge lock on the market and having ancillary merchandise selling out the wazz, Marvel and DC continue to cry poor and look for ways to cut costs instead of, oh, I don't know, making stuff that's actually worth the asking price. Marvel has gone "coverless", selling it's cheaper titles using the same paper for the cover stock that they use for their interiors (Deadpool is one of them). Across the street, DC has a slogan, "Holding The Line At $2.99!" The comic stories are twenty pages (saving a little on the page rates of the creators). The more expensive titles have a little more story, some bonus features, and such for $3.99.
This week saw the release of DC's The Ravagers #2, a $2.99 title. There were comments that something seemed lacking, so someone counted the actual pages.
I don't think anyone is upset about this. Once again, you make something worthwhile, people will pay what you are asking. The problem is DC put out this reduced count without telling anyone. Were there just some things that didn't make deadline (the issue has a different creative team on it)? Or were DC trying to pull this and hoping no one would notice? They wouldn't care so much if they got value for the money.
The bright side is, I might be able to up the price on Sound Waves and it'll still seem like a deal compared to The Bigs.