A couple that we are very good friends with, their 19 year old daughter dropped out of college to marry her bartender college drop-out boyfriend. They got married in secret and told their parents a week later. Everyone was disappointed/upset, but what is done it done. Her parents went to the state were she is at to meet her new husband and threw together a family only reception to give her away with dignity. No one was invited to the wedding or post nuptial celebration (out of state for everyone) other than parents and grandparents that drove all the way there for her.

We were not invited (no one was for that matter), but this is our good friend's daughter. I bought a card and I was wondering how much should I gift?

How much would you gift in this was your situation? Thanks