Here is a die struck counterfeit that has been showing up recently on eBay. It is die struck in China and to a trained collector looks very weird compared to a genuine coin. However there are collectors who are not well trained and will not suspect this coin. The main difference is the spacing of the date. Many of these have been artificially worn to simulate acceptance as a geuine coin.
If you see any offered on ebay you should alert the seller and notify eBay.
Counterfeit 1871
Genuine 1871 Indian Cent Bold N Reverse
Next is a Shallow N counterfeit which would fool just about anyone! The obverse shows light die cracks around the tops of most of the letters. The reverse shows a radial die crack from the rim at 1:30 to the top of the E in ONE. There is a mark on the neck that may be a defect from the original coin and may be a diagnostic for this counterfeit.
Transfer die counterfeit 1871 Shallow N
Here is another one - this has the same mark on the neck, but now has a die crack over the OF. The reverse looks like a different die.