I have to go metric to understand. Does this really means 33$ for 0,25 liter? Or a 100$ for a normal size European 75 cl oil bottle? That's 130$ per liter!
The very best olive oil from Italy will cost you less than 30$ per liter, what justifies the difference? How much truffle is in it?
It's your money and I can't say anything about a product I haven't tasted, but this price is outrageous.
Don't know in the US, but over here I can buy a 3/4 inch size black wintertruffle for 30$-ish and make a lot of truffle butter as discribed and tastewise, there's nothing like it.
The difference between the butter I make and oil is somewhat analog to the difference between a pill bought from a pharmacist and homeopathic fluid. One of them fysically contains the active stuff, the other one works on a another, more spiritual level.
You have to look for truffles with restaurant suppliers, I'm sure you will find them in the yellow pages.