I want to launch a full-featured online marketplace where verified business sellers list electronics, clothing, and home goods, and everyday shoppers create buyer profiles to purchase them. Core purchase flows must mirror eBay: instant “Buy Now” transactions as well as time-boxed auctions that automatically handle bids, countdowns, and winner notifications. Essentials I need built in: • Separate dashboards for business sellers and buyers, each with intuitive onboarding and profile management • Real-time chat so buyers can message sellers directly from a listing without revealing personal contact details • Promotions and discount engines that let sellers schedule percentage or fixed-price reductions, coupon codes, and homepage spotlight placements • Dual-layer rating system—star reviews and written feedback attached to both the product and the seller profile, visible after confirmed delivery • Modern search and category browsing (electronics, clothing, home goods) with filters, saved searches, and suggested items • Mobile-responsive UI, secure payments escrow, order tracking, dispute workflows I need to know if software is ready or will be developed? if mobile app available or only web view and the technology stack