How well do you know the couple would depend on how much to give. I think $100 min. for a sit-down dinner.
You can get monogramed towels. You can get a frame with the wedding date engraved in it. A album for their honeymoon pictures. A religious item. A small appliance with something fun thrown in...ie" quesadilla maker, with some fun cactus type glasses and some tequella or some hot sauces, and chile pepper accessories. Do they have kids or grandkids? If so, some other appliances would be the hot dog stand (throw in some condiments or hot dog shaped bowls/plates), the movie stand popcorn maker,,,throw in some popcorn flavorings.