lofy, let's look at it from this point.
Most of the suppliers purchase a specific authentic cigar (let's say PSD4) from Habanos SA for a specific price, let's say for the sake of arguement that it is $6 per cigar. Then the suppliers sell to the retailers for a mark up, let's say 30% mark up, since that is normal business practice. So now, the retailers are paying about $8 per cigar and they are going to mark it up a minimum of 30% mark up. So that puts the retailer price around $10.50 per cigar.
Now multiply that times 20 and you have about $210/box for a base price. So, a box at $120 would be suspect to be a forgery.
Remember, the numbers are hypothetical, so don't beat me up about them, but you get the idea.
Bottom line, check prices and then if the price you see from a specific source is more than 30% less than the average price you see, suspect it to be a forgery.
Just my opinion.