Show HN: Pricing calculator for marketplace sellers (Amazon, Etsy, eBay)

Hi HN, I built ProfitPilot after noticing many online sellers price products using incomplete marketplace calculators or spreadsheets. Most tools show platform fees but ignore advertising costs, returns, taxes, and target profit planning — which means sellers often discover real profit only after listing. ProfitPilot focuses on pre-listing decisions: • calculate true profit and margin • reverse pricing from target profit • test multiple pricing scenarios quickly It’s intentionally simple and platform-independent. Would really appreciate feedback — especially from anyone selling online or working in ecommerce tooling.