Ok, I'm going to jump up and down here strongly agreeing with ShadowCreator. Fake
Seated dollars ABOUND on
ebay! You are NOT going to be able to verify it is authentic via the seller photos, as many of the fakes are very convincing. Some are even die struck with proper amounts of silver exact to mint specifications.
Seated dollars are some of the most heavily counterfeited
US coins, and it is worth it to pay the extra 20% or so to get one that is certified.