Last month, I had a couple come into my Omaha office absolutely giddy about the "steal" they'd found, a seven-night Caribbean cruise for just $599 per person. They'd booked it themselves and were counting down the days. Fast forward three weeks, and they're back at my desk, credit card statement in hand, looking a little shell-shocked. The final tally? Just over $4,200 for two people after adding drinks, WiFi, shore excursions, specialty dining, gratuities, and, wait for it,