Unless you were going to bring a Warn back in your hand luggage, i'd think the postage would kill any savings you'd make. there are plenty of other reputable brands of winch which dont charge like wounded bulls because of their logo on the front
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On other matters, i've brought a few car and non car related products in from US and China etc, and warranty can be hit and miss, and you often have to pay return freight if something goes wrong/doesnt fit/doesnt work/wrong item etc. It might cost, say $20USD to get something sent here from the States, I've found that the return trip is considerably more expensive. It may turn out to be not worth returning. I had a large box of clothes/sports goods sent over which cost $20USD by USPS. It had several Tshirts, some sports gear, a couple of Hoodies etc. estimate to return 1T shirt , $20 AUD!! and that was for Snail mail, notAir mail which was how the original parcel arrived (Was here 5 days after i ordered!!)
Like many things we buy here on fleaBay/EvilBay, many manufacturers are now not honoring warrantees on items sold on "auction websites" as you are not the original purchaser or the item is a possibly a Factory Second etc. Check the details of any warrantees.
Small inexpensive items are often good value, and if you had to reorder because of issues, its no big issue. you might blow $20-$50 if something goes wrong, but thats the risk you take,but it doesnt happen often if you choose reputable sellers, who value their reputation
Good Luck!!!