Pretty penny? Nah.
Less than I'd spend on a night out at a restauraunt/bar, or on another computer game to add to the pile that I already have.
About the same as a new set of strings for my 5 string bass.
It was time to re-up my premium account anyway so I figured why not. It's a great credit-earner like all the premium tanks are. Plus it's fun to play to boot. I've got a Ferdinand to upgrade to soon, and it's going to need modules