I have recommended to a client of mine, that they move from zencart to magento.
In their current setup, they can lookup their suppliers part number and price to buy the cheapest one available to them from within the admin.
Is this possible with magento?
Attached is an image of this part, from zencart, brought up when accessing a products information.
Love the look of magento by the way. Easy to design for by the look of it.
Click thumbnail to see full-size image