I mentined that there were tourist busses at Zoser's pyramid and also at the Pyramid of Teti but almost nobody at Mastaba of Ti!
To get there you must go towards the Serapeum (closed for visitors since a couple of years) and go towards the Philosophers' Circle ... from there you'll allready see the Mastaba of Ti! Is one of the most interesting things to see out of Zoser's Pyramid!
If you've made it to Giza, then just go a bit further by car/bus to Zoser. Once again, if you've made it that far, dont stop now. Surrounded by a sea of sand, the step pyramids might blend with the plethora of other ruins, but they are the ancestoral beginning.