How much for a restored Tuff Wheel?

Tuff Wheel steering wheels are just what the doctor ordered for A-bodies. The stock wheel is too small in diameter for most men's hands. I have a nice black wheel but it is too tiny to really grip. I like the look and feel of the Tuff Wheel. It is expensive because they are hard to come by and the price is going up monthy. I bought a set of 68-70 exhaust manifolds on ebay about 4 years ago for $300. I thought they were expensive. Now they are going for $450+. I think there are only so many original Tuff Wheels in existence. If you can get one w/o restoring it, it will be expensive. If you want to restore one, it is even more expensive. What ever the market will bear is the correct price! :x