Time for my tuppenceworth. First off, I'd avoide eBuyer, as their prices arn't all that cheap if you look around, and their delivery is appaling (takes ages and costs the earth).
If it's just a cheap 19" you want, then you're probably best off with one of Dell's budget 19" monitors (E196FP). Less than two hundred quid, and unless I've missed something recantly, its difficult to find better for the money. But, like ike says, you'll only get 1280x1204 resolution (I say only, but unless you're into digital photograph or gaming in a big way it probalby wont matter). If you're feeling flush and do want 1600x1200 res, then take a look at the 2001FP, I have one and, even though the model is coming up on two years old now, I'm yet to see one thats better for the money (380 IIRC).