For me, it went this way:
SWAP MEET: The majority of my loot came from here. Made some incredible finds for insanely good prices. Got tons of manga for around $1, Japanese and English! Picked up loads of cheap posters, artbooks, and some older figures for nearly nothing. Also found a few very rare items, games, and more.
DEALER'S HALL:This is where I picked up some of the modern merch that only the dealer's would have- newer figures that had just been released, an artbook, evangelion bed sheets and...yea, that was all. Just a couple figures and an artbook. O-o didn't realize that was all. lol!
The problem with the dealer's hall, is that the dealer's vary in prices. Some sell things like manga for the same price you would buy them at a store, while some give you small discounts the more you buy. The other problem, is that most dealer's raise their prices by a whopping $15 the first day, and reduce it slowly by about $5 each day. By Sunday, everything has been reduced to either it's normal sales price, or has been discounted by a few bucks to make it look like everything has been hugely discounted. It is very wise to study items you may be looking for online before buying from dealers- they have a tendency to sell for more than something may be worth at times. If you can read Japanese, or can at least convert Yen into USD, you can haggle them when you find something amiss with a price. I did this many times last year, and it worked. Just don't pester the dealer's please. If one is firm on a price then either stick with it and buy the item, or thank them and walk away. For me, the dealer's hall is a place to find figures that have recently been released or are soon to be released. Usually you can find whatever is hot online- like recent released by Good Smile Company. But that's mostly it for me. But...you still never know what to find.
If you truly fall in love with an item, it's best to buy it and be happy than to not buy it and wait, and see someone else take it. Don't lie to yourself- OBEY YOUR IMPULSES!!!! O_O