So last night at my boys swim meet which I have been waiting to use my D610 and 70-200, I went to grab my camera bag and it wasn't zipped. My 70-200 went crashing to the ground luckily I had already taken the camera off of it and the camera only fell onto the table.
I bought the lens used on eBay and it came with a Hoya filter attached that I have never removed. It looked like the front of the glass was cracked so I tried to take the filter off but it won't come off, but the front part of the lens screwed off instead. I have attached some pictures.

It appears it isn't the filter that is cracked

What the lens looks like after I screwed off the top part

Side view of what I unscrewed from the body of the lens.
I went on the Nikon website and before I send this in for repair, I want to make sure I understand how it works. The website says it is $600 to fix the lens (cheaper than buying a new one obviously). But, then it also says that there could be another amount. My question is this. Is the $600 a fixed number or could it be less? Anyone with experience dealing with Nikon for lens repair?
And on another note, I went on Nikon's website to register my D610 and it told me my serial number is not a valid serial number. The serial number starts with 60xxxxx. I bought it on Amazon from an Amazon dealer (maybe my first mistake). I know I can't get it serviced at Nikon USA, but does this mean I didn't get a real Nikon?
I have an email out to the seller.
All in all, not a perfect night, although I did get some great pictures.
I bought the lens used on eBay and it came with a Hoya filter attached that I have never removed. It looked like the front of the glass was cracked so I tried to take the filter off but it won't come off, but the front part of the lens screwed off instead. I have attached some pictures.

It appears it isn't the filter that is cracked

What the lens looks like after I screwed off the top part

Side view of what I unscrewed from the body of the lens.
I went on the Nikon website and before I send this in for repair, I want to make sure I understand how it works. The website says it is $600 to fix the lens (cheaper than buying a new one obviously). But, then it also says that there could be another amount. My question is this. Is the $600 a fixed number or could it be less? Anyone with experience dealing with Nikon for lens repair?
And on another note, I went on Nikon's website to register my D610 and it told me my serial number is not a valid serial number. The serial number starts with 60xxxxx. I bought it on Amazon from an Amazon dealer (maybe my first mistake). I know I can't get it serviced at Nikon USA, but does this mean I didn't get a real Nikon?
I have an email out to the seller.
All in all, not a perfect night, although I did get some great pictures.