While not a great deal for those in the market for a new vacuum cleaner, if you already have Dyson gear and are looking to fill out your hardware, you can save a pretty penny right now via Dyson's online store, as long as you have the correct coupon on hand.
Thanks to OzBargain user "igorekh", you can supply the following discount code during checkout to save 30 per cent on full-priced Dyson accessories and tools.
According to igorekh, the terms and conditions state that the coupon can't be used with other offers and is only available online. You're also limited to 10 items, but that appears to be per transaction, so if you're super keen, you can do multiple orders and reuse the coupon.
Unfortunately, the code is very specific -- if doesn't work for parts, so you won't have much luck if you're looking for replacements bits.