Yes
When working out like for like cost
Of course the biggest impact is weight, so things like laundry pods/dryer sheets and unstoppables are going to be cheaper to ship than liquid/Powders.
But the exchange rate works in our favour too, eg a 102 wash box of Tide is about $18 on walmart, which to us at the moment is £13.65 - so 102 washes of Tide for less than £15
When you place your order, it includes the cost of the products, the customs fee, and shipping costs.
They then review the order and will normally come back with an adjustment, as usually when ordering laundry type products, the shipping can be a bit higher, but it has never be more than $15-20 more.
But you're under no obligation to continue the order when they come back with the adjustment, you can still cancel and receive refund.
In january, I ordered 2 bedsets, which each included a base fitted sheet, a flat sheet and 2 pillowcases, they equated to £60 for the 2, including shipping (but not customs, I opted to pay this seperately @ £16).
However, they are the best I have ever owned, they are big (of course as US) and they fit the bed properly, the fitted sheet has never come loose during the night.
I have a UK Superking bed, which is a US King Size, it was just 10x easier to shop for bedding in America than here.
But if you dont want to go down this route, then thanks to ebays global shipping program, shipping costs have become much more reasonable too (provided the seller in question opts to use the GSP when listing their item) they can still choose their standard delivery service and charge what they like. Whereas ebays GSP automatically dictates the shipping cost and cannot be changed by the seller.
I got 2 massive (100 wash I think) bottles of Gain liquid detergent, and paid about £35 for both, including shipping. So 200 washes of Gain for £35 = £0.17pence a wash, considering when not on offer, Ariel here is £0.37pence a wash, did not think this was too bad.