I have been using DR strings since 2012 and have always struggled to buy them in the UK, at least for a fair price.
Before the B word, I used to order DR strings via eBay and could sometimes get them as cheap as £18 delivered. Those days are long gone... now it's closer to £35/40. UK retailers are selling anywhere between £30-£40.
If you use DR, where do you buy them from? In the States, they're still around £20 delivered, yet nearly double that here.