Welcome to the forum , Shoemaker_Tyler .
Looks like a old trunk that someone took the time to refinish , paint & decorate ....perhaps because it was looking pretty rough .
I really don't know what you thought you were buying , so .....
A total rip-off , to me , would be paying the money & getting nothing in return .
I'd say that the black-painted panels ( I can't really tell , though ) are probably tin , and the gold painted hardware is steel .
You can easily test for tin (steel) panels & steel hardware with a 'fridge magnet .
I've seen people pay as much as you did , for much rougher-looking ones .
Most of these trunks are deceptively light-weight , compared to how heavy they 'look' .
If it does not 'flex' alot & does not stink like mold or mildew .... and if it works for what you bought it for ... what the heck .
Sure , you probably could have gotten one at a lower price ...say $50 -$100 bucks , but you didn't & it's too late to take it back , right ?
I'm not tryin' to be a smart-a** here , just trying to say that the old rule is : Let The Buyer Beware !
As far as it being an 'antique' I think it's missed the mark a little (antique = 100yrs old) .