Oh I'm having a similar issue, and maybe this will help you not get caught off guard like I was. Currently have some seats coming from the UK. The seller got a decent priced shipper, seats are all crated up and ready to go and then last minute I get a call asking for my import broker in CA (port of los angeles.) I called around and they want the following (mind you this is only when it hits the port, and is none of the shipping costs)
Broker fee $415
Customs fee $27
Warehouse fee $150
Freight Forwarder Fee $500-$800
Customs fee possible and pro-rated - $300/2000
I can ask the seller for the name of the shipper, but I would suggest someone that can go door to door like DHL without having to bring in 3rd parties etc.
(without hijacking this thread, if anyone has any good brokers/agents in Los Angeles, please DM me)