The disclosure statement would need to provide the donor with the deductible amount of the contribution and a good faith estimate of the fair market value of the item received as part of the quid pro quo (in this case, the concert ticket).
A disclosure statement for the quid pro quo isn't required if the item or services given to a donor have "insubstantial value," generally considered to be 2% of the payment or $50, whichever is less. A statement also isn't needed if there's no "donative element." For example, an item purchased at a non-profit museum's gift shop wouldn't require paperwork. Likewise, intangible religious benefits, such as payment for admission to a religious ceremony or annual membership benefits of $75 or less, don't require statements for a quid pro quo.