lol, I think of the GTL more of like the GE of RS. Just wish I could put in Buys (for at least items) so that I actually flipp stuff and make yen off of that...
In my ideal GTL (which is far from the one that's implemented), you don't get to see what's listed and you don't get to see the current Buys. It would eliminate people getting shinies for dirt cheap.
i.e. you could put in a single Buy for x,y, and z species with the condition that they are shiny and put up v amount of yen. That Buy goes to the system and puts you in a queue. You have priority over those who put up less money for the same conditions as well as those who entered the same conditions at a later time (you would actually be entered into 3 different queues for the example given, one for x, one for y and one for z). Once you are first in the queue and someone posts a sell that meets your criteria (i.e. shiny y) you buy that sell and your Buy is then removed from the system.
Hope that made sense. Imo, it would be much better than the auction house.