Lol
Ya a lot of people tend to do that, I'm one of them, well I used to be until I got me another DS and was able to trade my Pokemon directly to my other game =)i was on there looking for a Metagross, people wanted pokemon like Mew, Deoxys etc, yet the second you offer a pokemon such as Darkrai (cloned with AR) you will get whatever you want (I offered up a Darkrai in exchange for a Meganium Lv80 and up and got a Lv100 one), i also did the same for a Gengar (which i found out was hacked)
The other thing that annoys me is when they are offering a pokemon you want in exchange for a Darkrai, so i go to trade the Darkrai and it's not accepted because it isn't at a high enough level, i wish the levels would show up, someone also offered a Giratina (i think), they wanted a magikarp in exchange so i went to the resort area and caught the highest level magikarp i could find (74), it still wasnt high enough, i think they must have been using it to store the giratina or trade it to their other game