Negotiating low offer

[Miki Vargas]

I made an offer on a property here are the details. This property will serve as my office and later a rental, this is a condo unit.
asking $575 been on the market 45days, my Offer $525. My tap out number 530, after that the numbers do not make sense anymore. The unit will need at least 25K to just update. I really would like to pay only 525, how does one push for consideration of it? I'm the first offer they've had.