I am with Mikey.. You can't put a cost on a bird.. One bird might eat his pellets perfectly, another might chuck pellets everywhere and go through a bag 10 times quicker...
Your bird might destroy your ipod, your phone, your computer.. That is hundreds of dollars replacing your things..
Your bird might LOVE toys and need new ones every single week.. Others might not be a huge fan of toys so that will be cheap!!
You have already been told MULTIPLE times that a bird is very expensive!!
Every single bird needs alot of interaction and time, just because the bird is smaller, doesn't mean it is less important !
If you aren't in love with one species, and just keep changing your mind, then what is going to stop you from changing your mind in a months time?
You might get a bird, then in a few weeks think, hmmm, no, i prefer a conure now!
Do your research, find a bird that you LOVE and in a few months time, if you STILL like that species, then get it..
So many people buy birds suddenly, and then lose interest because they weren't the bird they really wanted...