Thanks for the link.
That scope cost $103. and you paid them $112., eBay fees plus Pay-Pal fees would be about $15. Unless they hit you for a large shipping charge they did not make money which is a sign of counterfeit product. They also used a Nikon "stock" image instead of an image of the actual product that they are shipping which is also a bad sign.
Nikon also maintains a minimum authorized price policy for the authorized dealers which this outfit is obviously not obeying which usually means they are not buying from Nikon...another bad sign.
Low end Nikon products are not your typical items to be counterfeited but the Chinese are always expanding their operations.
Keep your fingers crossed cause this one could go either way. They do have a large feedback rating in their favor but they also sell allot of other items (like mosquito repellant) that can get their rating up high.
In that class of scope it would be hard to tell optically if it is fake but would be easy to tell cosmetically and mechanically as most China made scopes have a tell tell fit and finish to them.