My understanding is that Skill Trainers will only have skills on them that you could have gotten in the previous area doing quests that you missed.
So if you just grinded to level 3 in Pre Searing and left without doing any quests the trainer would have a ton of Skills for you to waste points and money on. If you did all the quests relating to your classes then when you get to Post Ascalon he will only have maybe 1 or 2 skills at the most.
There is a trainer in Ascalon (post searing) and the next one you will come to is Grendich Courthouse which is out in Charr country. But again....if you keep up on your quests you wont be buying any skills or very few for a while. Im level 13 and have only actually bought 1 skill. Yet I have probably 30 or so I have "earned" doing quests.
Well, i cant seem to find the skill quest locations... i made a new monk and went to.. Ashford, green hills etc... But when i ask where to learn new skills they keep saying to go to the same NPC.
I had the same problems with my ranger but i found a NPC after asking 12 difrent people where to learn more skills.
So, if anybody could give me a DIRECT link to a quest location site etc and/or section i would be greatful.