Sky are doing an offer where the longer you have been a customers of theirs the bigger the discount you get on the Sky HD box.
If you have been a Sky TV customer for:
Up to 3 years: £279/€419 (saving you £20/€30)
Between 3 to 6 years: £249/€369 (saving you £50/€80)
Over 6 years: £199/€299 (saving you £100/€150)
https://hd.sky.com/thankyou/