When I was in year 10 my parents paid for me to go on a four day trip to New York with the school, that was £1100. If I were in that situation again (but if I had to pay) I would do it, but just because it's nice to go somewhere new for a treat and a break. I think experiences are better to spend money on than material things. Did you really enjoy it last time? £1500 worth of enjoyment?