Buying with Listing agent or Buyer agent for off-market property?

[Tony Zhang]

I'm interested in a duplex and submitted my offer with my buyer agent. I call the listing agent and she told me that seller has accepted other offer that is above asking price. But, she said there's also an off-market duplex available for sale in this community with the same asking price. At this time, I don't want to miss this opportunity should I make offer directly with this listing agent to get highest chance of accepting offer or talk to my own buyer agent (which she doesn't know this off-market deal, and I don't want she to spread the word to other interest buyer and increase my competition) and see if she can help me with submitting offer? 

Who should I choose and what's the pro and con between listing agent and buyer agent for an off-market deal?

Any comment on this is appreciate!

[Jonathan Greene]

I don't think you understand how this works, as many others don't as well. The seller is already contracted to pay a buyer commission and a seller commission. If you use the listing agent, they get both sides of the commission. The buyer side does not get waived. This is why you have your own agent who is on your side. When you use the listing agent their first obligation is always to the seller, not you.