I got it for £62 here using PSN vouchers from shopto. I rarely pay full price for games, usually wait for them to drop in price a fair bit before purchasing.
But GT7 was different for me. It's my first GT since GT2 (I moved onto Xbox/360 and PGR).
If ever a game warrants a full price purchase, it's this one in my opinion. There's loads of content/nostalgia here and there won't be a new one for a good number of years yet, so you'll definitely get your money's worth.