I think about $70 with a USB hub and shipping, but I'd get the cronusmax hub that works with pretty much all wheels and platforms. It came out about a month after I got the cronusmax plus or I would have got it instead. I'm sure it works the same.
It's called Drive Hub. There's a discount code for 10% posted by @VBR
It is, as claimed, awesome!
I have two wheels, G27 and G920. G920 works with GT6 on PS3. Both work with PCars 2 and GTS beta on PS4. Many other games have been used by many other GTPlanet members.