But few people pay the full listed rates.
Travelocity, Orbitz and Quikbook don't list rates for parking at the hotels they market.
Most of those cards carry annual fees, but like the sticker price of a new car, the listed rates rarely reflect what customers actually pay.
That way hotels, airlines and car rental agencies don't have to divulge exactly how much they're undercutting their listed rates.
Its fall fare sale on 10 southern European voyages lists rates from $4,235 a person, a saving of up to $8,000.
While the listed rates begin at 1,100 euros, or $1,672 at $1.52 to the euro, the hotel is offering rates beginning at $1,300 a room a night with a three-night minimum to travelers who ask for the United States-dollar rate.
The Hotel Raphael in Paris is offering guaranteed dollar rates starting at $490 a night this summer for a "superior queen," compared with its listed rates starting at 440 euros, or around $700 at $1.60 to the euro.
Despite the limited size of Google Print Ads, some marketers were attracted to it, as the program often gave them the opportunity to place ads at prices lower than listed rates.
But a criminal complaint cited several ads that referred to various sex acts, offered reviews of sexual performance and listed rates ranging from $150 an hour to $3,500 for a weekend.
Driving in the hills, I spotted a sign for La Finca Caribe, a guest house I'd noticed on a Web site, but had not phoned because the listed rates seemed too high.
