I know this deal won't be for many people at all, but with Father's Day just around the corner, this is quite a unique gift idea and would be highly memorable, as the person gets to spend several hours driving some of the worlds most expensive supercars.
It is a pretty good deal especially if you are splitting the cost between several siblings and possibly other relatives. I have purchased similar Supercar Drive Days for friends in the past and have cost nearly $1500.
This is a Father's Day special that Adrenalin are doing, normally costing $1035, but now 42% off. From experience, this is the biggest discount they have done for this experience and the discounts are usually much less generous.
You can get a further 7.5% discount by applying the Google AdWords promo code GA75OFF. This promo seems to work for anything on the site but I cannot confirm this 100%.
There are many, many other driving deals like the 50% off rally driving laps, but I see those on big special very frequently. Other fun experiences for Father's Day available, or even just for yourself. Don't forget to add the 7.5% promo code (like I would need to tell an OzBargainer)!
You can borrow my 25 year old tarago if you want, it will get your adrenalin going at 110km.