Ethical or not? Offer was not presented to the seller

[Kate J.]

Ok, I called the seller's agent to let him know that I want to make an offer. The house was sitting for 600k, lots of work had to be done on it and for whatever reason the seller needed to close by the 5th of October. Ive suggested no contingency and 500k. The agent said he needs to do some paperwork, and then he disappeared. Just received a letter from a wholesaler for 630k. No chance that someone will buy it for this price and close fast. The house itself is listed as under contract. I think it is not ethical from the agent's side. Should I do anything about it? Contact his broker? The seller got a really bad luck with this it seems.