[legion]

There is no questionable ethics on your part dealing directly with the listing agent. They'd probably prefer that as they will claim 100% of the sales commission.

There are plenty of opportunities for the listing agent to do unethical things to either the buyer or seller in that situation. The agent may or may not give into temptation.

I essentially used the listing agent to buy a house a few years ago. It worked out great for me, as she wanted the sale and had a good idea what offers the seller would realistically entertain.