If you have not got a cellular version, then instead of having to sell your non gps ipad, then the way around it, is buy the addon gps unit. If you have not got an ipad and thinking about it and can get the cellular one cheaper then go for it. For me was cheaper here to get the wifi only version.
This option is really for those who have the wifi version only and a way around getting wifi without the need to sell it and get the cellular version
This option is really for those who have the wifi version only and a way around getting wifi without the need to sell it and get the cellular version