i don't have a SERO but i do have a $99 family plan with just me and my wife i get a corp. discount for 25%. i got my diamond 10/10/08 from a retail store(it was going to be their display model)i got the corp manager to sell me it because my old phone was in like 8 pieces.i was not up for discount for 2 months. well he sold it to me for discount pricing waived the rebate. then he took $100 off for my troubles. so i paid $167 total tax and activation.
well today i loged on to my sprint.com and it said that i was a premere costumer and i qualify for adtional discounts(7yrs) it gave me the 2yr $150 discount plus the $75 for my 1yr discount. so i called in and was able to talk the person(easy actually)in to giving it to me for $124 shiped and waived the rebate.