Looks like a blazer to me although the pic isn't very good. Buttons are sometimes a good indicator. Blazers usually have a different style. That's a good price if the condition description is accurate. Fitzgerald is their fit based on JFK's suits. I have a two Golden Fleece and several 1818 suits in that fit.
Overall I would say it is a good deal at that price.
There are lots of Brooks blazers, sport coats and suits on eBay and here on SF B&S. Seller seems to be inexperienced. Nothing wrong with holding out for a seller with better pics and descriptions. Of course, he's not asking very much, so if money isn't an issue it might be worth the risk.