The question of how you should price your prints is contentious. Will low prices attract lots of buyers? Maybe, if you actively push your work, but it may also mean it isn't valued by buyers. In my case I reckon higher prices are good because if someone really likes something they will be willing to pay.
And I've never had anything returned. Some people upload rubbish and get sales cancelled because the quality is poor.
If the image is what someone wants, they will pay the price. Low price is not a way to sell more. The other part, you covered perfectly. FAA is not a stock agency!
Every so often I look at the recent sales page and I always see the same names every day: Dave Allen, Debra and Dave Vanderlaan, Thomas Zimmermann, David Patterson, Scott Norris, Larry Marshall ... all registered at least 10 years ago (2009-2010-2011 ...)
The search system favors those who make a lot of sales or old members.
Some people use FAA for order fulfillment, and do not care about being discovered or where they are in the search. When someone said he wanted some prints for a project, I put them on FAA and said, "pick what you need and what size". FAA is not a stock agency, it's a product fulfillment company.
I don't own a color printer. I don't have to produce, pack, or ship, frame, make labels, towels, or anything else, or worry about returns or customer service. I suspect that the names you mention do the same. They are already sold orders, and FAA has nothing to do with their sales.
Try looking at FAA from that perspective?