Market Fluctuator
The tool found here lists the items found in the 5e SRD, each paired with a profession (largely aligned with the tool sets presented in 5e), as well as a base resource - only 1 for simplicity's sake. Each has also been categorized into broad categories and rarity (with the intention that common items can be found anywhere, uncommon in larger towns, and rare in city centers). Use the filters below to find items quickly or to create quick and easy shop inventories.
Furthermore, change supply and demand to adjust the prices presented to better fit any settlement in your world! A number of presets have been provided to get you started.