Truth in advertising

I came across the following bargain as I was looking for my next scuba diving trip:

"scuba diving trip aboard the Utila Aggressor July 26 - Aug 2, 2008. $1700 Retail value $2195 Air Fare NOT included; additional $370 plus tips due on board at end of charter. "

The trip normally costs $2195. This special says it only costs $1700, but you have to pay an additional $370 at the end of the trip- for what?. So the cost is really $2070. Why don't they say that?

The airlines are doing the same thing with their baggage fees. The airline ticket might be $500, but then you have to add $25 for your first bag and $50 for the second. They don't want to add the cost to the ticket because the internet pricing systems will see the tickets costs $575 instead of $500.