Small business and freelance operations
Resale marketplace listing tools
AI and browser tools that turn item photos into listings for eBay, Etsy, Vinted, Depop and Facebook Marketplace, plus price research, deal alerts and listing evaluation for secondhand buyers and resellers.
Built for: Resellers, Etsy/eBay sellers, secondhand shoppers
Projects since May 04
224
Different builders
213
Last 4 weeks vs 8 before
-7%
AI is the core
23%
Projects per week
Mostly web app (55%), browser extension (22%), mobile app (14%) · from r/SideProject, r/chrome_extensions, r/SaaS, r/IMadeThis
Latest
- Prowl — Searches many resale marketplaces at once for a single item, saves recurring hunts, and flags new listings.“I built a web app that auto searches your hard to find collection”
- Ai lister — Generates Vinted listing titles, descriptions, hashtags and price suggestions from uploaded photos.“Ai lister”
- etsy-engine — Researches Etsy niches, scores and validates demand before generating digital products, then builds mockups, SEO copy and a draft Etsy listing.“I built an open-source Etsy engine that decides what to make before generating anything”
- Batonic — Lets buyers preview the actual digital or physical product, service, or deliverable before paying and offers a 48-hour inspection period after purchase.“After about 9 months in development, I finally stopped adding features and tweaking UI and launched Batonic at 1am this morning”
- reusefulshop — Aggregates live marketplace prices and real sold prices to show what second-hand items are actually worth.“I sell vintage items on eBay — so I built a price engine that shows what things actually sold for (and robots pay 1¢ per lookup)”
- ListingLift — Generates Etsy listing titles, tags, and descriptions from a product description.“I built a free tool that writes Etsy SEO listings in 10 seconds”
- eBay Wranker — Shows a seller's exact page and rank position for a given eBay listing and search keyword.“I built eBay Wranker — a free tool to track your exact eBay listing search ranking”
- SellRight — Generates resale listing prices and descriptions from item photos and posts them to Facebook Marketplace, Depop and eBay.“I finally launched SellRight, the app I wanted when selling my own stuff”
- DealWatcha — Monitors eBay for Pokemon listings priced below market value and sends notifications when deals appear.“Feeling de-motivated on a project I spent 3-4 months on”
- Catalayer Find — Traces products seen on shopping pages to matching supplier listings on 1688 and Alibaba and compares them.“I built a Chrome extension that finds 1688 / Alibaba suppliers behind products you see online”
- Snagr — Hunts for deals on listed items across chosen sites using an AI agent that matches plain-English criteria, checks prices against market rates, and flags likely fakes.“I have been building an AI power deal hunter and price tracker”
- Lets users build wishlists and gift ideas for family and friends, with metadata scraped from product links.“1 Month After Launch: What 4 Traffic Spikes Taught Me About App Marketing as a Solo Dev”
- Hawker — Generates tailored listing descriptions from a photo for multiple resale marketplaces and publishes them to some of those platforms.“Built an app that writes your eBay/Poshmark/Depop”
- Identifies products shown in videos so users can find where to buy them.“I got tired of screenshotting things in videos just to figure out where to buy them, so I built this”
- FRAMED — Lets people browse paintings, prints and posters through a swipe interface and save or buy the ones they like.“I built an art marketplace with a swipe feature for discovering art”
- Taste Library — Lets people showcase their collections and personal taste on a web page.“First customer in 30 days!”
- Crumb — Filters shopping search results by hiding listings whose text does not match the search, with a toggle for sponsored listings.“Searching for a desk shouldn’t mean scrolling past nightstands. So I built Crumb.”
- Etsy Profit Calculator 2026 — Calculates Etsy fees, real profit, break-even prices and recommended pricing in a downloadable spreadsheet.“Etsy Profit Calculator 2026 – Pricing & Profit Spreadsheet”
- Vizbl — Lets shoppers view products in AR at real scale within their space and embeds AR viewing into e-commerce product pages.“Vizbl - AR for trying products in your own space”
- Find Something Vintage — Identifies vintage items from photos, estimates value, and creates a scheduled eBay listing the seller can review.“I built Find Something Vintage – photograph an item, research it and create a real eBay listing in minutes”
Most discussed
- Manages Bol and Amazon seller orders, stock across channels, and repricing.“After 7 years, ~100K of my own money and 800 MRR, I'm shutting down my SaaS. My fiancée summed it up in one sentence.”
- caralert — Scrapes Craigslist used car listings hourly and emails or Telegrams alerts when a car is priced more than 15% below its estimated median market value.“I built a Craigslist scraper that alerts me when used cars are priced under market and turned it into a SaaS”
- Lets users build wishlists and gift ideas for family and friends, with metadata scraped from product links.“1 Month After Launch: What 4 Traffic Spikes Taught Me About App Marketing as a Solo Dev”
- Finds small fashion brands and resale listings similar to pieces and brands a user already likes, across marketplaces including Japanese ones.“How do i turn free users into paying users?”
- Flipstack AI — Lists personal items for resale in bulk, so sellers don't have to create each listing one by one.“Claude code is something else”
- Runs a marketplace app where buyers and sellers transact.“My marketplace app made $209 in a few days”
- Marktplatz Index — Tracks listing prices of a searched item on Willhaben and Kleinanzeigen over time to show whether prices are rising, falling, or stable.“Marktplatz Index - First Project”
- outdid.rest — Runs a live seven-day auction where the highest bidder wins a website's domain, source code and hosting.“What if the thing being outbid is the website itself?”
- Scrapes eBay listings at high volume and extracts live bidding data.“Can this be a good saas ?”
- Snagly — Tracks eBay listings and emails the user when the price drops below a chosen target.“Built an eBay price tracker, then couldn't legally charge for it — so it's free for now”