You don’t need to get a whole black truffle to enjoy truffle in food. But you do often need to read the labels carefully to distinguish between “this product contains actual truffle” and “somebody whispered the word ‘truffle’ somewhere in the vicinity of this product, and that’s good enough for us”.
I sometimes get a cheddar cheese with truffle in it which, while a bit pricey for cheese, is entirely affordable as a treat. It is a delight, especially thinly-sliced and melted on toast.