I had mine and didn't go. I don't have any regrets. Mine was $75 a person, so $150 a couple to go. I'm like you, we had the money to go, but the way we look at it is if I want to talk to someone that I went to high school with, I still talk to them. IMO, your 10 year reunion is just a place for everyone to brag on what they've got, who they married, how cute their kids are, etc.
So rather than go to our reunion (my hubby and I graduated from the same school, same year), we asked our fellow graduates that we were friends with to come to our house, throw money into the pot that they would have spent going to the reunion and we'd cook out, drink, socialize, and have a good time. Anyone else that we went to school with that our friends knew, they could feel free to bring them along and just forgo the reunion all together. We had a great time and saved a lot of money. That might be an idea for you to do rather than go to the actual renunion. Wait until your 20 year when people aren't stuck on the social stigmas that they are at your 10!