This is only for UK iTunes accounts, so yes less interest probably than US/Oz iTunes but I presume I am not the only one with a UK account too…
A £50 card should be about US$77 according to XE.com so about a US$14 saving over retail, or 18% ish…
They also have £25 cards for US$31.64 also 18% or so off:
http://www.cdkeys.com/itunes/itunes-gift-card-25-gbp
and £15 for US$21.84 but that's only about 6% discount:
http://www.cdkeys.com/itunes/itunes-gift-card-15-gbp
You can get a further 5% off with a Facebook like, on the email submit part you can put in anything… code changes every few minutes and the first one they showed did not work for me but got a second code after another minute and that worked.
Facebook like brings the £50 card down to US$60.27 which is about 22% discount.
Should be posted on Pombargain then…