A bit late hopping on the comment wagon, but I hope I can add my two cents.

(edit) sorry I hit "new topic" accidentally. ^^"
What's atrocious was a time I was bidding on a Belldandy cel a year or so ago on Y!J, and I mean, this was WAR. Price went to over 400, there were about 30 bids, and I finally threw in the towel. What happened?
That bidder ended up turning around, and hocked the cel on his sales page for $850 the DAY he got it from Japan. What on earth happened? I guess he did it because he knew there was someone here in the states (ie: me) who wanted this cel, and wanted it bad. I guess in his eyes he could make a pretty penny off of me - but I absolutely didn't buy it. It dropped to seven hundred. Six hundred. Five. Four - and then he started going into the negatives, and it ended up selling on ebay for a little over two hundred bucks. Remind you - he paid probably 550-600 including fees for it. So I sat back and enjoyed the show. ^^
I was really lucky on the AnC front - I've always admired Watase, and I hopped on Y!J when I had some extra cash and decided to see how much the cels were and was stunned at how cheap they were! 0_0 I won two Tooya cels and I couldn't be happier - they're absolutely gorgeous. And I only paid about $100 for the both of them after fees. ^^
But yeah, I think the cel market is way inflated. There's folks out there who may buy that perfect shot of XXX main character for $500. Yeah, it was expensive, and they'll keep it for a while. But then they turn around and go "Well, I know I only paid 500 for it, but it's worth $2,500 and that's how much I'm selling it for."
I don't know what my opinion is on the whole thing quite yet - it's definetly wrong and unfair to outbid someone else simply to re-sell the cel here in the states, but I've seen cels go on Y!J for next to nothing, and a seller buy it and bring it over here to re-sell and it actually make a pretty penny. Then again, that's not really fair either.
But yeah, you can't control the cel market. As much as we all would like to get that perfect shot of Julia from Bebop for $500. *twitch*
And I know Sletia's had to deal with the infamous 'bid on everything relentlessly although they already have 5 cels from that same, very rare sequence in their gallery' (

). But that's another case in itself, kwehe.