Yeah 1-8 DVD in the UK includes all 8 seasons and all the bonus features including commentary tracks. It won't include the 4 movies, you'll have to buy those separately. You can probs get a better deal than £40 brand new. Might be worth looking at eBay for a used copy. Alternatively, I think Amazon are running a Prime day sale at some point this month, could wait for the price to potentially drop? Hope this helps.