i saw a list of which of the * games you can exchange and pay £9.99 for any chart game.
by far the cheapest is enchanted arms which can be got for the princly sum of £17.99http://www.dvd.co.uk/product.asp?id=ENCHARMSPS3&PURL=dvddeals.at/findDVD&P36=5ZB4BM&CID=0&CTY=8
2% cash back ordering it through quidco
best for the new new games i would guess but you can get ninja gaiden for £27.99 using this.
obviously if you want any of the ps3 games then take enchanted arms in and pay the £9.99 ( or take 2 in, get store credit of at least £20 on the one and hand the other one over for the exchange, then they will take £9.99 from your credit to pay for the rest.
this leaves you £10 credit and the game you wanted, for the ocst of £38 ( 2 enchanted arms).
NOW, if you had ordered 3 copies of enchanted arms at the same time, go back 2 days later with the other copy and get another game of your choice as you still have £10.01 left in credit from 2 days before.
you have 2 new games you want for £54
£27 each is not bad for some of the games like the darkness (£34 is cheapest online), ninja gaiden (£34.87 is cheapest online), rainbow 6 las vegas ( £35 online) and a couple others, just a shame there are not many good ps3 games out at the moment, i will be getting rid of enchanted arms though , i purchased it and never got round to playing it and now have blue dragon on the xbox360 so will probably never play enchanted arms.
shame i dont know how long this is on for with enchanted arms as there are some good games apparently coming out next month including sega rally and driver ignition ( probably be delayed like all the good ones).