Neighbor's kid breaks homeowner's double-glazed sealed window, neighbor says "send him the bill" then tries to negotiate price because he "knows a guy" who could have done it cheaper:

A neighbor's kid accidentally broke the outer pane of a double-glazed window while playing ball. All good, though things happen, and the neighbor, the kid's dad, apologized and told the homeowner to get it fixed and send him the bill. After a window company explained that the window had been a fancy sealed glass unit that needed replacing, the homeowner ended up paying the $420 bill and dropped the receipt in the neighbor's mailbox. The neighbor's ease and assurance faltered as he balked at the price. Then, backing off his original offer. Seeking to negotiate offering to pay only $250, claiming he "knew a guy" who could have "done it for $250". His argument was that the homeowner should have sent him the quote first, which wasn't the original agreement.

Things got personal, though, when the neighbor further accused the homeowner of "nickel-and-diming a kid." And now the neighbor's wife is avoiding the homeowner, and the homeowner has been left wondering whether getting the repair done without consulting the father was unfair, despite his original offer to pay the bill.

Should the homeowner have notified the neighbor of the cost first? Or should the neighbor have honored the original terms of their agreement? 

I feel like we used to worry way more often about broken windows and specifically kids, whether your own or your neighbor's, putting balls, or pucks (or whatever other athletic equipment) through them. It's one of those things you used to see all the time in popular culture that has completely disappeared from the public consciousness… What happened there?