Peer-to-Peer Marketplace (Maybe API Required)

Hey! I am currently looking for a developer (or team) who can help me with the development of a new platform, which is a peer-to-peer marketplace for trading cards. This marketplace allows us to facilitate transactions between buyers and sellers, for a set range of products. This means a seller can sign up, find a product to sell on our site - and then proceed to sell it to a range of buyers. Each product has it's own page, and multiple sellers can sell the same thing (I have a few examples I can share with you).

For reference, the project brief and short feature list can be found here. Please reach out with any questions and I'm more than happy to provide some example sites in PMs.
Budget is just a number - let me know roughly how much you think this will cost as I don't have a budget for this, and would like quality over affordability.

https://docs.google.com/document/d/1tAPtOr5vcKWwBuQvTohQLNqjZsIcr7x6B1N7nn1WIoo/edit?usp=sharing

Kind Regards,
Charlie