I'm dismantling a 6' x 8' aluminium greenhouse - with glass panes (all intact)

You can buy greenhouse kits of replacement fixings.

I see that new greenhouses that size sell for around £450. How much do you think I should ask?

And should I completely dismantle it or just remove the glass and disconnect the base so that the greenhouse could actually be easily walked by two people from A to B or loaded onto a small truck?

Thoughts?