Prices may vary by region, but generally it's $10/qt and most filters are $16. For me the total was $66 - $25 = $41 + Tax. That's only about $5-6 more than buying the oil from Wal Mart and going with the Mobile 1/Pennzoil Ultra + Purolator PureOne (or whatever filter) route.
Here's a 5qt. Pennzoil Ultra Synthetic + K&N coupon for $40. Not as good as the RP IMO: http://www.pepboys.com/sale_speci...ch
Good luck and have fun under there.