Gift for an Agent?

[Alex Hohenstein]

I'm under contract on 2 properties and the agent is representing myself and both sellers. The negotiation process has been rather eventful with some  demanding and particular sellers. My offers were $30,000 below list and the agent was able to get both sellers to close at $27,000 below list. Despite the circumstances, the agent has worked hard to help me negotiate the best price and terms, including taking a slight cut on commission to help make the deal work. I've been very thankful for all the extra time and effort put in to help me get the deal. I want to thank him with a gift somehow, but I'm not sure if agents are legally allowed to accept gifts. What would be the best way to show thanks to a particularly hard working agent aside from a great review and referrals?