Play-Asia GTX 980 TI's

Hmm I'm on my phone but I couldn't see a head office address or contact details so that's a negative for that website. The other issue is I assume they are based outside the EU and you are UK based? If correct you would be liable for VAT and import duty which would be added once the package reaches the UK. Now some Asia companies get around this by sending packages as a gift or not declaring the true value. Also if you buy from a UK supplier you are far better protected by your consumer rights and it should be easier to resolve any issues should the item be faulty.

To me that £100 saving comes with some risk and if you did get stung for VAT and import duty of would cost a lot more than £100