NDA documents when looking for partners on a deal

[Laura Casner]

Looking for advice on NDA's.  I have a deal and business plan that I need to source capital for. I need a large downpayment to close.  I'm concerned about a scenario where I show the property to a potential investor then that person with the cash to close circumnavigates me and approaches the seller with their own offer, swopping in and grabbing the property on their own.  Anyone have advice here? Does it make me look bad?  Does it turn off people from funding my deal?  Is it common?  Anyone have links to templates for something like this or a sample they would share?