It seems like a genuine mistake and lack of communication with both parties.
Toys19 send the extra £10 and the deal is done. Then forget about this thread as this kind of thing happens all the time.
Southbank boy - Yes it was Toys mistake, but knowing he made a mistake you could have pm'd him BEFORE starting this thread. Your post of 'why should i have pm you not my f/ck up i new you would pm me sooner or later' is pretty crappy, if you knew he would pm you eventually then why not wait for the pm and sort it out privately?
Lets try to keep things amicable guys, with better communication things get sorted. If you are selling/buying then make sure both parties agree to the same price and details before sending goods and/or monies.
I don't want this thread to evolve into a big arguement so I am going to lock it. Toys19 or Southbank Boy please pm me if you have any problem or want a mediator for the completion of the sale.