Are we saying this watch is fake? Please excuse me, but all I see is a TAG Heuer exclusive chronograph, model CN2110-0. It's got the classic Valjoux 7750 configuration which TAG renames as the Calibre 16. So the model and movement numbers look good. This watch is from the early to mid 2000's, and I don't believe fake TAGs from that era looked as good as they do today.
I couldn't see any red flags, other than the low price. But this is ebay - perhaps the seller is hoping for a bidding war? Also, we have no idea about the movement - it very well could need a service which would not be cheap.
Of course, one should never buy a watch without first buying the seller. For all we know, you could be paying for this watch and receive a box of potato chips in the mail...