Non Exclusive Option to Cash Buyers - What Does This Mean

[Brent Sweet]

I cold emailed a "cash buyer" in a Facebook group last night about a property I have under contract that I am looking to wholesale.  He sent back a very short email that said "Can I send a non-exclusive option to market your St. Louis deal to my cash buyers?"  While I want to disposition the deal I don't have a ton of margin in this deal.  If I say yes to this what am I agreeing to?  Can this be done since I am, myself, trying to assign the contract?

Thanks!