Re: The total list price was $3.2m, discounted to $1.25m
"But if you get a 40% discount on this product and some much much larger customer gets a 61% discount"
40% is the absolute minimum you should expect. 61% is better. Nobody on these forums will tell you the maximum you can get, that's down to your negotiation skills. If you don't get 61% off list for your enterprise storage change your supplier. Bear in mind though that they might have just never showed you the list price :)