Startup Idea: Predictive Software for optimal selling times

Startup idea to develop a predictive software for refurbished eCommerce sellers. This tool will leverage data to make calculated predictions about when a product will sell best, thus helping sellers optimize their product listings and tackle market fluctuations for enhanced profitability.

I work in Refurbished eCommerce. I sell computer parts on the website ebay.com.

Part of the problem is trying to make enough profit to cover the costs of eBay and Paypal fees. A big pain point for me is the fluctuation in prices over time.

For example I bought a monitor two years ago that is selling for the same price today after it had dipped to $50 for a year. I don't now if this is because of a lack of inventory or if it has to do with the economy. It could also have to do with taxes and how much disposable income people have.

I would like some predictive software that would be able to guess when a product will sell best.

In this scenario maybe I would wait 15 days to put it on the market if the market is crowded with other people selling the same item.

I would be able to pay for the product if the product could prove it would save me money.