I did try that once on a cel that had been 
sitting on a dealers site for months.  
Nonetheless, I was rejected. ^_^; They must have 
known what they were doing, however, since they 
did eventually sell it.  

Timing is probably a factor. If they can afford 
to have the cel sit and wait for a buyer to come 
along who is willing to pay the price, why accept 
a lower offer? You may have better luck with a 
dealer who is dependant on selling in stock 
merchandise to pay for new merchandise.

Another thing to consider is what price the 
dealer paid for the cel.  To begin with, they may 
have paid a high price to get it, so they might 
not be so eager to let it go for less than what 
they paid.

Just some thoughts. Although I'm sure an actually 
dealer better answer this question!

--rg