Those things you look at and think "That looks good" and then see the price and think "Well I'm not paying that!!!!". For us we'd always thought that the deserts at the firework desert party at the MK looked very appetising. Also the idea of sitting there eating whilst watching the fireworks seemed good, until we saw the price
We also last year saw the amphicars at Disney Springs and thought it looked like a rather exciting activity to enjoy. Once again though we thought the price far too prohibitive, we could afford it if we wanted but just couldn't justify paying that for what it was.
Anything else out there that you'd like to do but won't pay to do?