Self-limiting Numbered Editions

All of my photographs are sold as numbered editions. They are self-limiting since the price is increasing by 20% for every additional edition. Every photograph comes with a certificate of authenticity.

The "first edition" of every image has its own fixed price. Then the price for the "second edition" increases by 20%. After that a "third edition" is published which again is offered at a 20% price premium to the previous edition.