Section 3343 sets a special measure of damages for fraud in the purchase, sale or exchange of property, and it is deliberately different from the general tort rule in § 3333. Subdivision (a) gives the defrauded person the difference between the actual value of what they parted with and the actual value of what they received — the out-of-pocket rule — together with additional damage arising from the particular transaction.
The additional damages are listed. Amounts actually and reasonably expended in reliance on the fraud. An amount compensating for loss of use and enjoyment of the property to the extent proximately caused by the fraud. Where the defrauded party was induced to sell or part with property, an amount compensating for profits or other gains that might reasonably have been earned by using it had they kept it. And where the defrauded party was induced to buy, lost profits or gains reasonably anticipated from using or selling the property had it possessed the characteristics fraudulently attributed to it — but only if three conditions are all met: the property was acquired for the purpose of using or reselling it for profit, the defrauded party reasonably relied on the fraud both in entering the transaction and in anticipating profits, and the lost profits were proximately caused by the fraud and the reliance.
Subdivision (b) contains the exclusion that defines the section: it does not permit recovery of the difference between the value of the property as represented and its actual value. That is the benefit-of-the-bargain measure, and this section refuses it — you recover what you lost, not what you would have gained if the lie had been true. Subdivision (b)(2) preserves any other legal or equitable remedies a person with a fraud or deceit claim may have. Which valuation date and which figures apply to your transaction is a question for a lawyer and often for an appraiser.