That's a slick concept - using micropayments for auctions could solve the trust and friction issues that plague traditional secondhand marketplaces. I'm really interested to see how this idea evolve.

Have you though on wich tools to use? If it can help, these are the few I've been playing with V0.ai Lovable, Bolt, Rollout, and Mocha. They are specific for Ui providing a good start to continue building up on.