
When we got married (many moons ago) my middle brother gave us £100. I was overwhelmed, because he was only 18 at the time and didn't earn that much. However, he was adamant and we were grateful (our house was nowhere near furnished). But when he got married 9 years later, I felt I should do the same to him. However, we then had two small children, a larger mortgage, and I had just given up work to stay home full time. It was a real struggle to give him the money back, but I felt it was only right (even though it was worth a bit less after 9 years).
£50 is much better and they will get a nice sum together for their Plasma!