Kurt-- My suggestion for dealing with RE Brokers would be this: tell them that you want something in Palermo or Belgrano, and that if they cant deliver, you will take your business elsewhere. Turn the heat up on them.... its the only way they will make an effort to get you what you want.

Also, I suggest you contact these people.... they should be able to give you some other options.

http://www.ibr.com.ar/international/

Cheers,
Gaucho