Your example would likely be unenforceable because contract terms must provide _consideration_ for both parties, or an element of fairness in the real assets being exchanged. Requiring one party to purchase a Lamborghini at the sole discretion of the other provides no consideration for the former.
An example of consideration in a penalty clause like this is AT&T's failed acquisition of T-Mobile US, where the contract forced AT&T to pay $3 billion and give up wireless spectrum when they abandoned the deal. In this case, the consideration was T-Mobile's time and money spent entering the deal in the first place vs. the penalty to AT&T.
It's also worth noting that "unfair" and "deceptive" are not synonymous in their legal definitions. An unfair practice involves terms that are not beneficial to one party and are unreasonable to avoid, while a deceptive practice is one that misleads the party into accepting unreasonable terms.
An example of consideration in a penalty clause like this is AT&T's failed acquisition of T-Mobile US, where the contract forced AT&T to pay $3 billion and give up wireless spectrum when they abandoned the deal. In this case, the consideration was T-Mobile's time and money spent entering the deal in the first place vs. the penalty to AT&T.
It's also worth noting that "unfair" and "deceptive" are not synonymous in their legal definitions. An unfair practice involves terms that are not beneficial to one party and are unreasonable to avoid, while a deceptive practice is one that misleads the party into accepting unreasonable terms.