I recently bought a bass from Canada. It arrived in just under two weeks but would have been quicker without the impact of Covid.
Upon import they asses the value of the bass, this can be the full retail value at worst case, add on the cost of shipping, add on import duty and then tax on the grand total. It is a lottery I think.
In the interest of transparence I paid £1,400 for my bass, express shipping using UPS was $300 CAD, and the total import charges were £277 which I think was reasonable.