Mambamonster

One of my co-workers dad is wanting to sell his MT 4.6 with all original parts and controller. Heres were its shady, I only have a few pics of it and his dad is not wanting less than $300 already more than what my LHS said its worth. I have given my conditions that I need to run it or observe it running before I make the decision. Its been a few weeks since I made my conditions and still every time I bring it up my co-worker always seems to make some excuse of why I haven't been able to see the truck. Do you guys see any red flags with this situation and if so should I disengage myself from the offer? Thanks.