There is a fair and reasonable price to pay for anything; then there is the price you actually pay.
The price you pay for something is what the something is worth to you.
Otherwise, if it's not worth it, you'll choose not to pay the price.
"Rip-off" only applies if there's something dishonest going on, like for example making it impossible for you to find out what the landing fee is until after you've landed, and then impounding the aircraft until you pay.