230 pounds is equal to 280€. Basically, every r9 280x is priced from 270€ - 320€ these days. I wouldn't call it a good deal, since AMD cards prices skyrocketed, but it's not that bad either.
Personally I would go for cheapest one. Gigabyte's r9 280x is 219 pounds if you buy it from hardwareversand.de
http://www.hardwareversand.de/3072+MB/127775/Gigabyte+Radeon+R9+280X+Revision+2.0%2C+3GB+DDR5%2C+PCI-Express.article
find it on idealo.de and you can get it for 206 pounds.
I hope I answered your question.