So I've got a situation that has gone on for far too long. I've been serving this customer for the best part of 18 years. He's still essentially paying 2000 prices, although I recently managed to increase the prices a little. A £20 watch he is buying for £7, up from £5. A ridiculous situation I know. Completely my fault for letting it go on. I am very certain there is an underlying mental health problem, that's him not me. He sometimes buys a watch a week, never returns them, and doesn't care what it looks like. I am certain he is not reselling. Last week he came in for a high security padlock for a shop, I said they really start at least £30, and suggested some places as that is not really my range. He bought an economy padlock for £2.50, in the end. He asked for exactly the same thing yesterday, this time I just said no.