Costs of replacing double glazing units?

Have a slated roof conservatory/sunroom which was built at the same time as my house 7 years ago. The glass was severely scraped through careless cleaning.
We're looking to replace the glass units. I understand I'll need to get a rep out to measure, quote etc but has anyone an idea what sort of price these units are? Will have to replace at least 8 units - roughly 3ft by 3ft each.
Also given that it is a conservatory and heat loss can be an issue in winter time what is the minimum spec one should be looking for when replacing?
Thanks,
L

Hi,

These previous threads might have some info about cost of replacing units.

If you run the search option yourself, in this forum only, you may find some information on double and triple glazing.

Hi leex,
Try templogue windows, (no connection) we have to get our windows replaced and I did a search on AAM and they got great reviews from x customers in AAM.

We got a great price and will probably use them.