Originally Posted by
sam_goh
You can pay the difference by credit card, but honestly a $25 cert usually has a much larger minimum spend than $30

Thanks ! I hadn't considered the minimum spend part of the equation.
So in other words, if I am thinking of checking out a couple of restaurants using Restaurant.com certificates, and if I will probably spend $ 20 or so in each restaurant, then I should buy $ 10 certificates because the minimum spend is usually 2 X the value of the certificate ?