Can you sue a buyer for backing out of a deal?

Hi everyone,

The other day, after negotiating back and forth, we were offered a fair amount for one of our domains from the buyer and we accepted. This was over email.

Anyway, days later they say they are not doing it anymore because they think the domain is worth less and they’re willing to do half the price we agreed to. We have no interest in halving the price.

So, the question is does an accepted offer for a domain (over email) serve as a valid contract that we can take legal action…

Can you sue a buyer for backing out of a deal?