Can I trust other players in the real estate game?

[Doug Eric Gueirn]

I am talking to individuals in my area who are investors and buy properties. I mentioned that I am starting out in the business myself and would need someone to sell contracts to. These individuals said that they would take contracts from me if they are good deals. 

Should I be worried that they could scalp my contract from my by going around me, contacting the seller and negotiating a better deal after they let the contract expire? Is this something that I should be worried about? does this type of activity happen in the space? 

How can I protect my interests in this matter? What can I do to ensure that I don't get scammed by another investor when I am just trying to do my deals?