Yep...bottom line is your customers will determine what your prints are worth.
"Everything is worth what its purchaser will pay for it."
Publilius Syrus, Roman Writer (~100 BC)
On the other side of things, many years ago, I knew of a local professional photographer who litterally had two price lists. One list was for one community he dealt with, and it had what you might call "regular" prices, and the second list had prices that were 20% higher than the first list, and that was for other people.
Depending on who or whom we was dealing with, he woudl pull out one price lsit for his services or the other. Usually the second price list was for people who wanted to haggle, and from what I understand, the final price was often just above or below what his "regular" prices were. For the record, I don't know how he determined which price list he was goign to use, but some people are good at judging others. Just look at professional poker players.
This all took place long before the internet became common place, and I do not know if you could even try to do such a thing today. But he did it for a lifetime, and retired from a long and successful career.
good luck