It might be possible to rule it out as being authentic or fake if you could test the balance and handling, since the 19th/20th century repros weren't "life or death" functional like the originals. The few people I've talked to who have handled authentic pieces say they don't compare to even the best modern repros.
Since this one has a maker's mark, it might be worth checking with the Met in NY for their list of known maker's marks. And the same for any other museum who would help try to validate the piece. It doesn't rule out somebody making a repro with an authentic makers mark, but short of carbon dating, I don't think there's any "guaranteed" way to know.
But that price seems way too low, not even having a comma in it. If antiques were that cheap, we'd just buy the real thing instead of repros that cost more.