Iron Baltic skids

For those that have purchased the plastic skid sets can you give me an estimate on any additional charges you were charged (tariffs, taxes, etc.) when they arrived in the states. Were they charged on delivery, did you get a bill later, etc.? Once purchased a large automotive part (independent rear suspension) from England and got tagged about 15 months later with a tax bill from my state tax office and was trying to estimate up front what ordering from eastern Europe might entail. Thanks,