There are different options for screens, oled, lcd, with frame, without frame. I agree 250 is very high so I'd suggest trying a different repair shop. It is possible to do it yourself if you buy a screen with the frame attached. You'd need to buy some adhesive too to close the phone afterwards. There are loads of screens on ebay (uk anyway) so loads of choice. Always check the sellers feedback as there are some bad ones on ebay.