£8.49 for an A3 canvas print is pretty good value for money. I've used this company before and I was pleased with the results so think this is a very good deal.
I ordered 3, so I can hang a series of prints on the wall. Also, this splits the delivery price nicely.
As member Happyblob pointed out, if you like them at http://www.facebook.com/1ClickPrint they will send you a £5 discount voucher, making the delivery only £1.