lol, no probs mate.
For a $170 it might be worth it. Just last week i spent about $300 getting the gear to change my car over to brushless.. Because, you get the new motor, which needs a new speed controller. The new combo needs more power so you go lipo. Lipo means new charger as well as the new batteries. Because you now have a faster motor, you need to change the gears of the car so you dont damage it so you need some new gears. Also, because if your lipos get damaged, or aren't balanced properly or whatever they can catch on fire you need a lipo safe bag...
Breaking that down for ya cost wise:
Batteries for the sport will be something between $20 and $50 depending on if you buy it online from overseas or ebay, or your local hobby shop (LHS). The charger for those will be somthing between $20 and $50 depending on what type and where you get it from. Because these are NiMH they are pretty easy to charge, just plug em in and let them go.
For the flux
Lipo will cost you about the same overseas, but will be alot more at your LHS. Lipos can be a bit fiddly, you need to be a bit more careful with them and they can catch on fire (if your not careful)