On a given day, we see about a third to half of the auctions available. Naturally, they're going to focus on the ones where the main characters win (unless Mark shows up). As for hit after hit -- we're two episodes into the season. The red ink is coming.
The entire cast has complained that fans of the show appear at the auctions just for the fun of bidding them up. (Also, see above.) Wonder how many lockers got dropped on them when the main five cut out ahead of imagined schedule?
As for fame going to their heads -- I did see an online review of Jarrod & Brandi's thrift store which was complaining about how high the prices were. For a thrift store. Apparently three dollars per CD is unthinkable in California. Who knew? Other people said that if you were polite, you could get an autographed picture with no fuss and the store had DVD sets available, but that was about it for visible fame-riding.
Then again, it's hard to trust online reviews. I saw someone bashing Dave's store with such fury that my first instinct was 'troll'. Supposedly this person had seen urns used for storing pet ashes being resold as vases, screamed at Dave about it, and got thrown out of the shop. Dave's a lot of things, but among them is 'dog lover'. I don't think that's a line he would cross.