Riser.
The price only ever goes up

Buy early,
or pay more.

List something with a starting price and a step. Every few units sold, the price climbs to the next tier - the same pattern behind tiered event-ticket pricing. There’s no clock and no countdown: price is driven purely by how many people already bought, and it never comes back down.

The price starts at your starting price and climbs by your step every time a tier's units sell out. It never comes back down, and nobody pays the same price twice.

Runs on Stripe test mode.