Has anyone noticed the gold costs for training are almost never what it says when you talk to a trainer? I just did some light armor training and the trainer interaction says the cost would be 1100, and it was 4150. It's not the first time, either.

O.o what level is your Light armor? I've never had that happen, then again I've never trained light armor, try it with another skill? maybe it's just isolated to Light armor

Yeah, it's happened with many trainers in different skills. Sometimes its less than advertised, sometimes more.