I use Michelin wiper blades had them on car for 18 months now no issues with them. Just waited for Asda to do promotion on them so had 2 28" wiper blades for £16
eurocarparts / carpartssaver (same company) have bosch cheap. save even more by buying each blade separately rather than a twin pack for the front. Free delivery - usually next day via UPS.
EBay wipers have proved a bit random for me over the years. I was very influenced by the Autoexpress review. Incidentally, I'm replacing blades from Ebay after a few months (rubbers look fine, but they're blowing off the screen). A quick search suggested 6 to 12 months is life expectancy for blades; I'd normally hope for much longer than that.
I get flat upgrades of ebay £6 delivered had 2 sets,been fine,last about 2 years...
Under £3 in The Range and Wilkinson