Ask smart questions about the specific auction, 
be smart enough to ask early, and don't ask 
redundant questions.

You could always try to get a deputy service to 
ask a question for you, but be smart about it, 
and don't be surprised if they turn you down.  
For me, sometimes they could do so and sometimes 
they couldn't.  Like I said, Sato had done this 
in the past for me many times, but even he 
wouldn't want to post annoying questions to a 
seller.

I'm surprised Celga does do this for customers 
(they always refused, from what I have had 
experienced and heard), but I'm sure that you 
still will have to make your requests early (not 
1-2 days before an auction ends, for example), 
nonetheless.