It wasn't cheap because of the conversion rate and shipping. The headrests were 30GBP a piece and shipping 50GBP. About 176USD after conversion. I was hoping more along the lines of 30USD for items, 50ishUSD for shipping. But I felt if I didn't pounce, it would have been a long while before I'd get another chance.
I've been burned in the past by choosing cheap international shipping, so I ponied up more for something quick with tracking. It came in like 3 or 4 days.
The empty spots in the seats were bugging me and I had refused to put the original potato heads back on; especially knowing how it should be.