Dungeons and Dragons

As a DM, my biggest complaint about the magic item shop generators online is the lack of exact price. Most come with a rarity, but I personally feel like the vast range in prices is too great for me to just plug and play. For example: I feel like a cloak of displacement is much more valuable than say a Berserker's Axe, even though they're both "Rare". So I felt like when players asked for a shop, I had to take time and read up on the item and then assign a price.

Would you use an online tool that was free (with like Google ads on side panels or something) that had associated exact prices (randomized between 75% and 125% and assigned value) that had a sliding scale based on something everyone probably has figured out for their world, like the price of a potion of Healing?

I've made a python script for my own personal use, and I'm thinking about turning it into a full web application. But I wanted to get your opinions on if this a tool you would like?