If it is a relatively small package with moderately low value and coming by mail, other than maybe sales tax, you shouldn't face any other charges. The biggest problem I have ever faced with extra charges was overland shipments via UPS. Avoid this method like the plague, UPS are scam artists when it comes to brokerage charges, especially when it is shipped in this manner.
Just make sure to confirm with Monoprice whether there may be shipment options with different companies which is usually connected to speed of delivery.
