My LiPo charger costed in the ballpark of $120.
You'll thank yourself for buying a good charger the first time you see a lipo cell ignite from overcharging with a shitty charger.
You'll also thank yourself after you have to replace your 10th lipo because your charger doesn't store the batteries properly, charge them properly, or balance them properly.
"Someone in a Prius tried to race me at a stop sign the other day. I couldn't believe it. I had him for the first 100 feet or so but I can only walk so fast."