Template for a MarketPlace

What’s the best knack template to use as a draft to start building an intermediated marketplace where buyers can ask for quotations & sellers and offer their products?

Buyers would be able to show interest in offers, and sellers would be able to offer in response to inquiries.

With that information the database owner would try to find “matches” between buyers and sellers.

For that, would you use one table for inquiries, and another one for offers?

Or would you just simply use one table with a field Offer/Inquiry?