Electrix ECX Boost 1/10 Scale RC retail Buggy with Radio

Product Name: Electrix ECX Boost 1/10 Scale RC retail Buggy with Radio
Electrix ECX 1/10 RC Boost Buggy Car with Radio and Charger. It's in pretty great condition for a used RC car. Even the underside has pretty minimal scratching, nothing is broken or in bad condition. It is tested and works great. It comes with the original radio and a battery charger. It has a 7.2v 4200mah battery in it. It will run for about 5 mins on a retail battery charge. I'm not sure if that is a normal run time (seems short to me) or if the battery is weak. The local hobby store told me a battery pack replacement runs between $12 and $35 depending on brand and quality. It's a 6 cell 7.2v pack with Tamiya style connector.