Amazon.co.uk - BOGOF On Disney DVD / Blu-Ray Combo - £12 GBP / $19 AUD
Some of the older classics are £10 each on DVD like Aladdin, 101 Dalmations, Sleeping Beauty - Plus you get another one of your choice for free. (£5 each)
The blu-ray/DVD combos are a bit dearer @ £12 but again you get one free so essentially £6 each (about $9.80)
There's Toy Story 1 & 2, Wall-E, Monsters Inc, Bolt, Cars, Ratatouille. I just tried to order Toy Story 1 and 2 and it says they're out of stock unfortunately.
Delivery is £2.09 (per DVD delivery) and the highest delivery rate is £5.27 which works out alot about half the price of buying Disney movies here.