There's a Kubuki Dance aspect to this dialogue. They want to know if you're interested. You say sure, how interested are you? The path forward, first seek to u

There's a Kubuki Dance aspect to this dialogue. They want to know if you're interested. You say sure, how interested are you? The path forward, first seek to understand who they are, what there motivations are. If they are serious, engage them in a live conversation, preferably face-to-face. Ultimately, the market value is determined by how much someone is willing to pay.