Ethical dilemma with agent

[Marci Stein]

Working with an agent for almost 6 months who is 3 hours away in MA. 

He sent me a listing for multi unit which didn't look appealing so  I passed on it . It's too far away for me to see every house. 

Now, a month later , he tells me he went to see it and liked it so much that he and his brothers will make an offer after New Years .

If I had known it was that nice I would have made an offer . It makes money for sure!

Is it too late for me to make an offer?