Sales volume estimation tool for Amazon listings

An Amazon seller finds a product with 500 reviews and 4.8 stars. They assume it sells well. They're wrong — it has three sales a month, inflated by review manipulation, and the category is dying. Real sales volume data is the difference between a 00K/year Amazon business and a garage full of unsold inventory. A sales volume estimation tool scrapes BSR trends, tracks rank velocity, and cross-references category data to give sellers an actual number — not a guess. Jungle Scout costs 00/year and does this badly. There are 9.7 million Amazon sellers globally, 2 million actively selling. At 9/month with accurate estimates, you're building the tool every serious seller checks before placing a purchase order.