[asutekku]

I would imagine most people are going to buy the music where they usually buy it from. And with just three sites it compares I could just check these sites by myself. So for now it lacks a bit of content.

However, something I would like to see and i think could be more niche-oriented would be similar as this but for physical releases. Discogs does have some retailers, but they need to manually upkeep their inventory in there. If you could scrape physical releases and show where I can order album X for the cheapest (shipping included) or even see where it is available to buy, that would be a service I would love to use.

[yalooze]

I used to do just that (check them manually) and so built this to scratch my own itch :) It used to have Google Play as well but they sadly moved out of the digital music purchasing space.

Regarding Discogs - I don't have any interest in physical media unfortunately so will leave that problem for someone else to solve.

[polynomial]

My understanding is that Discogs has mainly eaten this market. And my experience is that the same items on eBay are consistently higher priced on average (sometimes much more.)

[fapjacks]

Just a heads up to OP... Discogs is definitely a mom-and-pop endeavor in more ways than one. If one were nimble enough, I am almost certain they could not keep up with a more featureful competitor that shaved off the (many) pain points of buying/selling in their marketplace. Inventory (and want-list) management being a great example.