Toshiba laptop battery exist in different types. There are varieties such as laptop batteries for Toshiba DynaBook, T, TE, Satellites, Portege, Libretto, Qosmio, and PocketPC model types. There are specific stores that sells particular laptop batteries, and it is advisable to buy from these stores.
When you buy from stores that do have so many various laptops battery, then there is the possibility that they sell less quality laptop batteries.
Also prices for a typical Toshiba laptop battery varies depending on the seller, and the type of battery needed. The prices range from $50-$100. It might sound expensive to those who buy less quality batteries. But if you are given a battery from a specific laptop battery store as mention above, then you have a good battery.
Although, you have to be budget conscious at the same time, but it helps to buy a battery that gives you rest of mind.