Legal to market a property prior to closing? (not wholesaling)

[Joe P.]

I know a similar question has been asked a million times and I will probably get a variety of answers but I do not plan on wholesaling this property. 

I fully intend to close on and buy this property myself however I only intend to do so if I can find an end buyer.  I would like to advertise on facebook, zillow etc. and close if and/or when I find a buyer.  I know most people are asking this question as it pertains to assigning contracts and it seems to be a bit of a grey area but if I intend to buy this property myself when I find a buyer does that make it less of a grey area?  If it is legal do I need to disclose that I don't yet own the property?