Jeff - I thinks he's just asking what it cost YOU (Ball Park) to do it....not what their prices are.

Obviously, you were a one off...and others would most likely benefit from what they learned doing yours, etc...so you could certainly caveat that you are not their spokesperson, and the price you paid is the price YOU paid...with NO implications as to what anyone else paid, would pay....etc.

Or just say you spent so much that you're kind of sheepish now, or whatever.