I have my own unique set of rules for vetting potential customers and their vehicles, one of the rules is no (word deleted for PC correctness). The other morning there was a phone call from someone with an accent who had been recommended by the place that does my MoTs for me, he needed his Metro suspension pumped up, he needed it done the same day, stupidly I agreed, instead of just saying I was not taking any work at present (my usual response to foreign accents), he asked how much? I replied that it would be twenty pounds if there were no complications, he said 'would you do it for fifteen?' I could not believe the cheek of it and told him where to go and blocked his number from calling again. So the moral is stick to your principles in the first place, and instincts are usually right.
mrcheerful