max of price displayed on site

How to find the MAX of price displayed, variable "value" in the below site/code?




import java.util.List;
import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;


public class quikerSearch {

public static void main(String[] args){
WebDriver driver=new FirefoxDriver();
driver.manage().window().maximize();
driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
driver.get("http://www.quikr.com/maruti-suzuki-cars-cars/maruti-suzuki-cars/z71");
driver.findElement(By.xpath("//*[@id='modal-citypopup-close']")).click();
List <WebElement> elements=driver.findElements(By.xpath("//*[@id='products']/div/div[2]/div/div[1]/div/div[2]/span"));
for(int i=0;i<elements.size();i++){
String value=elements.get(i).getText().replaceAll(",", "").replaceAll("[^A-Za-z0-9,]", "").replaceAll("AskForPrice", "");
//int a=Integer.valueOf(value);
//Long a=Long.valueOf(value);
//System.out.println("Value is :"+a);
System.out.println(elements.get(i).getText().replaceAll(",", "").replaceAll("[^A-Za-z0-9,]", "").replaceAll("AskForPrice", ""));

}
}
}