Every place that displays the prices it only uses $ symbol next to the amount (for example $25), but that could mean USD, CAD, AUD, NZD, MXN, etc.
(Note: not limited to just this page)
Prices need to be displayed with proper currency, in this case USD would make more sense (25 USD), otherwise people will think it is their own $ currency, which might differ from USD.
Credit: JXM on Discord