What scam is this?

I do email only and if an inquiry is as generic as "item still for sale?", then it's pretty obvious it's a scam.

Ask me a human, reasonably intelligent question, and I'll respond.

I also don't get the "I don't have time to answer questions" mentality.

That's how you make a sale!

Converse using the method that accommodates safety and the time convenient to both parties- email, and answer questions.

Simple recipe for success.