I see scan have implemented an order by price option - excellent!
Could you review your out of stock and pre-order icons please - they are very tinsy and don't really jump out. If you remember to keep an eye on them its fine, but sometimes its a bit difficult. Maybe instead of a green tick on a white field have a white tick on a green field (and similar for out of stock stuff). Or a completely different icon for in and out of stock so that it stands out a bit more. Maybe print out of stock items in red font on order confirmation.
The reason is i ended up ordering something on "pre-order" as one of the items in my order. I decided to wait anyway as it was significantly cheaper than an alternative, and i didn't feel right breaking the order into two (both over £25 but i'd feel cheeky getting two free deliveries).
So just a suggestion that might make shopping at scan a less stressful experience.
Thanks.