The price looks too good to pass up.Carnival (CCL 0.48%) (CUK -0.07%) is the leading global cruise operator. It has fully recovered after sales went to zero early in the pandemic -- and yet, investors are sending its stock down this year. It trades at a dirt cheap valuation, but its growth story is far from over. Here's why you may not see an opportunity to buy it at a price like this again.Carnival is cruising againInvestors sold off Carnival stock when it had to pause operations and took in no revenue dur ...