I had this recently...in another state. The attorney advise the inherent seller to not show the house until there was a "firm deposit" on the property. The reason why he asked that is because he didn't understand what wholesaling was, but knew that it wasn't illegal to do.
His concern was that he didn't want me to blast it to my list and have 10s of people walking through the house. Also this was a recent death in the family and the seller was very young, being represented by the Attorney.
The first thing that I did was try to re-ensure the Attorney that we are on the same team and want the same resolution. I didn't have this under contract but it had not been marketed to. I actually (by posting on CL) got in contact with this attorney that, in his words, wanted to avoid realtors. He said that as if he had a bad relationship with them.
What I did was explain to my buyer that this is the situation. It was a good deal and that I would also be on the contract, as well as my buyer. The buyer literally went to see the house, and made a decision to buy it (tentatively). I then schedule a meeting with my buyer, myself, and the attorney over the phone. We came to an agreement that would allow me to sell to my buyer, have him put a 10% deposit 1 day after a personal inspection with him and the seller, and then he would conduct the closing. The deposit went to escrow.
After that it became easy. I got my money. My buyer got a deal at 55% of ARV. The seller and Attorney got their money.