Can't find a buyer??

[TJ Cone]

I've never done a deal.  But speaking hypothetically...as a wholesaler, what happens when you find a great deal, get it under contract with a seller, but then aren't able to find an investor buyer to assign it to??  Are you stuck with paying for the property in full?  Are you supposed to have a clause in the contract where you can back out at the last minute if you can't find a buyer and maybe only lose the earnest money?  Any feedback would be greatly appreciated!  Thanks!