Ad said contact was text, and listed number. Seems one fella texted and one is crying rat and wanting an explanation, but "I'll take it" should not trump other's text time, but that is up to poster and seller in my mind. Seems easy to determine who got first dibs duck.
Oh, and do not stop posting such; that was a good deal you shared out and I am sure all would be glad to see more such deals in the future. LOL