(Photo: Daniel Maurer)

Pour one out for a slider joint that served “one of the best burger bargains out there,” according to burger connoisseur Nick Solares.

A sign announcing the closing of Mark Burger appeared in the window of the popular slider joint on St. Marks Place today. It served the “best sliders in Manhattan,” according to the chowhounds at Burger Conquest.

The handwritten sign, on green posterboard, reads, “Gone for now but not for good. Peace to the ones who still believe in Mark.” The sign asks the public to “stay tuned.”

The restaurant, which opened in 2009, was also known for its giant cow on the roof and its offerings of craft and seasonal beer. Instagram and Facebook pages for Mark Burger were last updated on Sept. 4 to announce the closure of the restaurant for Labor Day.

We’ll let you know if we hear more.

Update, Sept. 21: Brian Pollock, former manager of Mark Burger, tells us it’s leaving St. Marks because “rent is too high, it’s too hard to keep up.” He added that the neighborhood has changed considerably since the restaurant opened its doors eight years ago. “It’s a place where people used to go for dive bars, to get a hot dog at Papaya King,” he said. “Now people go for cocktails and noodles. It’s not necessarily good or bad but, unfortunately, it’s not as suited for us.” There are no current plans for reopening; the restaurant hopes to return in some fashion in the future, though Pollock concedes the reopening would likely be outside the East Village.