I'd have been a bit pissed.. but to be honest from his point of view, someone has come and given him cash for something he had for sale, rather than refuse the sale as he'd 'promised' the parts to you then run the risk of you ducking out on the deal..
Live with it dude, unless the cash has been exchanged then no deal is set in concrete.
Mind you, that is bloody cheap for a complete rgv front end, you should have driven down with the cash if you'd wanted it that badly!
I can see this post getting deleted soon though.. happens a lot round here.
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More **** two strokes than you can shake a **** stick at.