One of the cheapest places in the u.k. to buy a korg pa1x (new or used) both with guarantee and delivery is 'Whitley Bay Home Organ centre'.0191-2571-666.Ask for Edna, and prepare to haggle.
Hi-Tech Direct, 57 Harpur St.Bedford.01234-212588.Mob 07957-122650.
Richard. Or Peterborough Organ Centre 01733-313598 also stocks korg keyboards.
Musicland of Bromley (S.E.London) 0208-698-7300.ask for David.

I haggled like there was no tommorrow. Youi'll need to do the same!!