A few years back, I stumbled across some very cheap Airfix Centurions in a bargain bin at an excellent Hobby store in Newcastle (Australia - not the UK). At the time I already had 3 Centurions, and a pretty detailed list in my head of what I wanted to purchase at the store. Centurions did make an appearance on the list. I stood there for 5 minutes trying to decide on picking them up or not. Eventually I reasoned to myself - I'll never need more than 3 Centurions - and went and bought the stuff I had planned. I've regretted that decision ever since!
So when I started 3D printing, Centurions were high on the list of things that needed to get printed. Here's a little sample: