Amtrak charges more for downstairs seating (quieter, more private) than for upstairs seating on applicable trains in coach.

Choice tables at high-end restaurants are reserved for return customers, owners, or for those who pay more (usually a "gratuity" to the maitre d').

Seats at theaters and at concert halls are organized into pricing levels. These distinctions are frequently further modified (the best seats retained by the house) for the best customers, patrons, shareholders.

Taken to an extreme (and an ideal market pricing theory), every seat would have its own price, and they could all be unique. That price would be the highest revenue that each particular seat could fetch when it was marketed: 105 seats, 105 prices.

IMHO, increased variability in pricing is the future for many types of items with reservations, for example, time at the dentist, at the mechanic, at the museum. Highest pricing bucket for the most desirable times, next bucket for the shoulder times, next bucket for the earlybird or off-hours times, lowest bucket will be the standby people (no reservation) who will be first come, first serve after all reserved customers are admitted.