Hey, use this site:
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I use it a lot myself and delivery is instant. It is a pound per 10k so you could get 20k for your £2 or 30k for £3.
I've used the site twice myself, it is safe to use and delivery is instant. You put up a player and put in his name at checkout. It finds it in the auction house, after paying and verifying you have the coins straight the way. Happy to help