[member=9512]Unfated[/member]
Had a quick look around Ebay.com (where the prices are in Dollars) and that's a reasonable price. It ain't a bargain, but it ain't a rip-off, so I'm guessing ol' Greg Scott has also done his homework.
CO Tardis sets always hold their value after they've been unavailable for a few months, and then the price slowly goes up. If you want to be brutal, you can probably sell off the ones you don't want for a profit, especially nearer Christmas when it becomes a seller's market. The 13th Doctor's TARDIS is especially sought after now, as it's also the 14th and 15th - but a word of warning: there's a good chance CO will re-release it as "15th Doctor's TARDIS" to tie in with the new series in May, and then the bottom will drop out of that market.
If it was me, even though I've got most of them anyway (wasn't interested in the Peladon and Visitation ones) I'd still go for it and sell the ones I didn't want.