Garmin gave me a 20% discount on the new 590 when my 550 failed.
I had to send the 550 to Garmin of course.
Thats encouraging news! I found a document online that said that the 590 was not eligible for the discount but maybe it was an outdated document. Did you have to mail your 550 in first or did you have to pay full price first then get a credit for the 20% back?