With voters going to the polls in four days, Republican mayoral candidate Nicole Malliotakis decided Friday that a single image was the best way to make the point that the de Blasio administration engages in pay-for-play.

So she attached four “For Sale” signs to a gate around City Hall.

“This is the reality of Bill de Blasio’s New York,” said Malliotakis, while hanging the red-and-white signs on the Centre Street side of the building.

“This is a tale of two cities where he, his friends and developers are doing extremely well and making a lot of money, yet the rest of New York continues to struggle.”

Each sign had handwritten, telephone contacts linked to City Hall’s shady dealings.

One of them was “(800) RECHNITZ,” a reference to mayoral donor and confessed briber Jona Rechnitz.

During Wednesday’s mayoral debate, Malliotakis accused de Blasio of “shaking down” donors and said “we need to take the for-sale sign off City Hall.”

On Friday, she called on New Yorkers to elect her so the “for-sale signs” can come down “once and for all.”

Although the actual signs were removed shortly after Malliotakis addressed reporters.