Your prices are high compared with up here in Dundee (Carnoustie to be exact) Akasha.
Are they? The price I quoted for Discus was for some I saw at Maidenhead Aquatics a couple of weeks ago and MA are expensive for everything. I've no idea what my usual small independent lfs charges for them as I've never seen them there but it'd probably be about 40 quid. It's rare to see anything like Discus there.They will order in specific fish though if you ask for them. It's normal to pay either 4.99 or 5.99 for cories round these parts and that's at all the lfs's that I use and I have 3 different stores nearby