Oh man, Im so there with you.  There are a few 
people I can think of (who frequent this board 
actually) who constantly bid on items on Ebay, 
and they have little or no intention of really 
buying the item.  This isnt just with cels 
either, and not only people in this community.  
But, I can think of many instances off the top of 
my head when I see certain people go bid on 
things and routinely jack up the price..and they 
NEVER win the items.  It's almost as if they just 
do it to create the false market.  Im also not a 
fan of bidding on things just to bother other 
bidders, or make them pay more (sorry Yann).  
It's just plain not nice.  When I see an item on 
Ebay that I really want, and I mean really want 
it, it's not just an impulse buy, I enter my 
ultimate max right on the spot.  Sometimes, if I 
want it bad enough, and I get outbid, I will 
enter a higher amt later.  I also dont like it 
when people snipe (sorry Japester).  I had a very 
bad experience with it so Im tainted.  When 
someone snipes your dreamcel that you've been 
watching for a week by a mere dollar, I dont call 
that very nice.  Yes technically they win, but 
being the stubborn ass that I am I dont think 
it's a -real- win.  This is what taught me to 
enter my max right on the spot, and not to wait 
til the last moment.  

Anyways, back to the topic, I know what you're 
talking about, and you're not alone.  There's a 
few people who I wish I could drive to their 
houses and ask them "Why do you bid on this stuff 
when you're not even going to win 
it!!!! :SMACK:"  I guess it's all part of the 
game.  It's a good thing Im not too into Ebay 
right now...I hate the stress.