Wedding Gift if Only Attending Ceremony
I was invited to my ex boyfriend's wedding. We don't really talk anymore, and haven't been close for some time. I was contemplating whether or not to even go because I'll be out of state both the weekend before and after, and also because it's an hour and a half away from my home, which means I'd be getting a hotel, not to mention that fact that I've never even met his fiance. Anyway, I decided to make the trip out there with a friend for just the ceremony. That way it wont be totally akward, I can say I went, and I wont have to worry about paying for a hotel, and also have them pay for my food at the reception, etc.
My question is, do I get them a gift? Or would just a card be ok? I have no idea where they're even registered. I guess if I did get them something, I would just mail them money and a card, although I don't even know their address (but I'm sure I can find out). Anyway, I really don't want to, and don't have the money to spend, but I don't want to be tacky.