I have put my beloved guitar on Ebay, assuming that it was a RG-321 (I, too, bought it from Ebay a few years back thus I wasn't entirely sure of its origin).

See here : http://cgi.ebay.co.uk/Ibanez-RG-321-electric-guitar-royal-blue_W0QQitemZ280406061683QQcmdZViewItemQQptZUK_Musical_Instruments_Guitars_CV?hash=item414980f273&_trksid=p3286.c0.m14

However, after a few days a fellow ebay user has emailed me, observing that most RG-321s only have 2 pickups, whereas mine has three - as you can see in the pictures. I wouldn't like to sell it on to find that it wasn't an RG-321, have to go through the hassle of sending it back finding that the original owner has put a new neck on a different body or something.

The back of the head of the guitar says RG-321 as the model number and is made in Korea. The serial number starts with C03 thus i'm assuming it was made in 2003?
The number 2 in the model number means that it has an HH config. It looks like a gio body with an rg321 neck on it.
Ibanez RG570 circa 1993
Ibanez S2020XAV
Carvin DC127
EVH 5153 50w
Orange PPC112
Thanks a lot, the body looks just like the GIO GRG270B models I have seen on the internet - http://www.axemail.com/images/fullsizeimages/grg270bjb.jpg.

I can't believe I never noticed.. it never occured to me that it was unusual that other RG321s had no mid pickups.. I assumed that my model was an older model.

I'm assuming, despite the extra pickup, that it is inferior to the RG321 body?

EDIT: Yeah. It does look more like the 170.