Are you sure you're not going to lose your budgie in the new cage?!
Your old cage looks very similar to the cage I just bought for my future budgie (currently will be used as a camping cage for my Amazon though). It was really hard to find a large enough cage with the proper bar spacing second hand. I think it's due to poorly educated employees working in pet stores around here. One cage I found had 1" bar spacing and they used to have a cockatiel in the cage! I asked them why they had bought a cage like that for a cockatiel and they said that's the cage that the employee had suggested they buy!
What are the dimensions of the new cage? I bet the little guy is going to love having so much room!