Rear Break Discs - These Look Ok ?

Chaps - just flicking through ebay as and saw these:

http://www.ebay.co.uk/itm/NISSAN-SUNNY-PULSAR-2-0-TURBO-GTI-R-REAR-KINETIX-GROOVED-BRAKE-DISCS-ZINC-PLATED-/251460678133?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3a8c3971f5#ht_1744wt_1255

Was thinking it would be good to replace my rear discs as they are looking a bit sorry for themselves.

The above seem to be extremely cheap compared to everything else - are these ok ?

The above are ok I have them fitted to my pulsar and I paid £50 for them second hand of bobby last year and for £40 new they are a good upgrade

i always found blank disks to be better than ebay grooved discs

Ive got these front and back .... seem ok ... 

thanks for the responses - i decided to order a set - at that price i thought why not - positive feedback knowing a few of you have them sits good with me !