Okay, peggichu has already directed you to Celga, 
which is the most popular service.  Can't go very 
wrong there.

Now let me calmly explain to you why Yahoo! Japan 
threads aren't very popular here any more:

[1] Like peggichu said, there used to be a lot of 
annoying threads where people wanted to point out 
various auctions for little to no reason that 
really serve no real purpose.  Especially when 
people start posting images of cels that aren't 
even theirs yet... that's a tremendous memory 
load on this server.

[2] Threads like yours asking about deputy 
services and so forth have just been as numerous 
and almost warrant a FAQ section, but that's too 
much work for the administrator and it's a 
subjective topic some times.  Which is why...

[3] The forum that ura suggested to you was 
created SPECIFICALLY to deal with Yahoo Japan 
topics (by a fellow cel collector).  That forum 
was created to make those topics less burdensome 
on this forum and to give Yahoo Japan users a 
space of their own to discuss their interests.

If you were kind enough to accept ura's 
suggestion as a friendly one, you would find 
within a minute (after clicking on the link) a 
thread which compares different deputy services 
and what the different opinions were on them.  If 
you were shopping around, this would have been a 
useful link and it definitely wouldn't be wasting 
your time like you said it might.

I think ura was being fairly nice and doesn't 
deserve to be snipped at like that.  Every 
regular here is pretty mellow, is good-natured 
and tries to help.  We tend to discourage flames.