Got a good deal

I just got my Shinchan tin coasters!!
So shiokz...this ebay seller shipped the item so fast and the shipping charge was only USD1.50!
I paid USD5 for supposedly 2 tin coasters. One in blue and one in pink.
Imagine my surprise when I saw 3 coasters! There was a duplicate of the blue coaster.
Not sure if the seller packed an extra one by mistake or it was really the price for 3?
I will just take it that I am lucky and got one extra by mistake. :)