Oh wow, I have a 10pack of T2 tanks on route for only $15. Be aware that the T2 heads will work on trition tanks, but the T2 tanks will not fit on the Triton batteries. (Without an adapter, and even then, it will look strange if that matters to you.)
Either way, I recommend Triton coil heads for the trition tanks, they are made for them. But honestly, I can't tell the difference if any, between the two.
T2's come in long wick and short wick also. Obviously Triton heads are all long wicks, but some people swear by cutting their Triton coil wicks stating it can produce better flavor and vapor. If there is truth to that, I couldn't tell you, physics wise it doesn't make much sense besides the distance of wicking travel, but you still have to tip and swirl when it gets low so....
And yeah, don't recommend that place to your friends, or go back there unless he will let you haggle him down 75% or his markup. Maybe his overhead is just that high, but as a vapeshop, he should be buying his stuff at wholesale prices, so that is just crazy. I hope he doesn't sell Halo stuff, I couldn't imagine what he would be charging for a 30ml of Halo juice.
Where is the shop located, maybe there is some strange ecig tax going on there and it isn't his choice but to sell stuff that high. I can't see people's locations from my phone.