Marketing a wholesale deal prior to having it under contract

[Barima Opong-Owusu]

Hi I'm a new wholesaler working on a deal where the property has an ARV of $100K and I discussed with the owner getting the property at $45K. This leaves a lot of room for my spread and repairs because the property is in good shape. The drawback is that the seller is going through a divorce settlement and legally can't sell the property until things are finalized in November.
I would like to start marketing the property to my buyers list so that when I can get it under contract things proceed quickly. Would it be best to wait until I have it for sure before I start marketing or can I start to get the word out so that's don't have it under contact for a while? If you do think I should market to my buyers, what would be the best way to go about it discretely since its not under contract?