Yes, ME ME ME!
Ok, serious now
, the keys I got are from ebay - 2keys.
In fact, the 3rd link you provided, the seller "carkeysolutions" is the same guy I purchased from.
He/they/she is located in Duluth, Georgia, USA.
I belive "carkeysolutions" has multiple EBay accounts and sells on all of them. I purchased 1 key from 2 different people:
1 from "professionalcarkeys" - Ebay link to the item I bought =
http://cgi.ebay.com/ebaymotors/ws/eBayI ... &viewitem=
1 from "carkeysolutions" - Ebay link to the item I bought =
http://cgi.ebay.com/ebaymotors/ws/eBayI ... &viewitem=
Both came from the same land-address
I had them cut & programmed at an Infiniti dealer; $60 to program (regardless of how many keys), but $10 to cut each key, totalling $80 to cut & prog both keys.
I've been using the ebay key for the last 1week or so, and it's been working fine for me. No issues whatsoever so far.
The 1 warning - if you looked at the Ebay links I provided, the "silver" part of the key body (ie. the resin/plastic) is not metal. My original Infiniti key is metal there.
All these ebay keys are, are copied keys, and they somehow created a mold to put over a "cheap" metal part of the key where you cut, to resemble OEM. I don't doubt at all that these were made in China or someplace similar (not racist - I'm chinese!!!) for dirt-cheap.
I've heard of some people say that the dealers or locksmiths wouldn't cut these Ebay keys because of the metal was not "pure" or something. My Infiniti dealer didn't complain or mention anything about it to me.
Here's my overall thought about these ebay keys (positive)
1. Funtionality (1-10): 10, so far working for me!
2. Durability/workmanship (1-10): 8, because it's not 100% OEM, but I expected that
3. Aesthetics (1-10): 8, again, I expected the part where the key-ring attaches to is metal, but not, they just painted it silver
4. Overall (1-10): 9, one-point off because not 100% OEM, but it works! and cheaper than an OEM. MUCH cheaper
5. Refer to friend? Yes, I would - but I would give them the same warning to not expect 100% OEM, but that it looks the same.
PS.
I did try to find a local locksmith to cut & program my ebay keys - all of them waved me away saying that it would be a liability to cut a key "unique" that a customer brought in. Unique in that it said Infiniti and was a particular design. The liability resided in that if they somehow cut it wrong or poorly - they didn't wany to be liable to replace your key for you. I gave up my search and just let Infiniti do it.
Of course - Nissan dealerships should be able to do the same - there's not much difference between programming, and definitely not with cutting.
Good luck!
(sorry for being long-winded)