Depends on what you buy, and the type of license you get. I am not sure about WinRunner last time I checked it was around $10,000. But I can tell you what Rational TeamTest costs. Its around $4,000 for a node lock license, and around $8,000 for a floating license. TeamTest is the smallest suite you can purchase that has Robot, and RobotJ. All the other suites get higher in price. I recomend it!
Contact the vendors direct for pricing. You can get indicative (ie, list) pricing fairly easily and remember to factor in the maintenance and support costs (add about 15 - 18% of the price) which is an on-going expense. Also remember that discounts can be had depending on what you want and the number of licenses involved.
Good points above. Also remember that vendors are simply quoting their price to you. That does not mean they will not change it if you ask. Negotiate as much as you are comforatble with. I have found sales reps willing to "discount" their products if you talk to them right.