Would you buy a domain that appears to be actively used if it's listed for sale?

Would you buy a domain that appears to be actively used if it's listed for sale?

I came across a domain that is currently listed for sale through GoDaddy's marketplace.

What's unusual is that the domain has a functioning website, and there is also a working API on a subdomain. The site doesn't appear abandoned, and from the outside it looks like the domain may still be in active use.

Website: https://backsuit.com
Api service: https://api.backsuit.com

My first thought was that the owner might have accidentally left the domain listed for sale or forgotten to remove an old listing. On the other hand, if it's listed through a legitimate marketplace, I assume there are safeguards in place to ensure ownership transfer is handled properly.

From a domain investor's perspective, would you consider purchasing a domain in this situation?

Have you ever seen a domain that was actively being used while also being legitimately for sale?

More importantly, do you view buying it as a normal business transaction, or as taking advantage of a possible mistake by the current owner?

For context, the website is live and the API endpoint responds normally, which is what made me question whether the listing was intentional.

I'm interested in hearing both the practical and ethical viewpoints.