gonna go in the next couple of weeks, before it closes for winter

had a look on ebay, lots of tickets for sale etc, was thinking bout getting some, cheaper than 'on the door' but sort of worried i'll buy em get there and they'll be invalid etc?

anyone know how to get cheap tickets online? been to www.altontowers.com can book em in advance but it only saves a couple of quid!

any ideas guys??

rory