Cupidon is good and generic enough even in French but the end user market maybe small ao to the right user max might be $500
DiscountVouchers.co. Good name.but I dont know if people print coupon codes these days so $xx-low mid $xxx
MyPremierCard.co
Not sure what to use for this one so I dont see any big value...Above reg fee I would say.
If you can see what the domain can be used for then you have better chances of selling