Weekly tourneys around here are still $20 plus an auction.
Starting to have a couple higher ones per month ($30-$50).
A local guy is opening a new room in a couple months who added a lot of money to all of his tourneys when he had his last room.
We're all looking forward to that one.
Around 40-45 years ago, the room I played at had a weekly tournament on Saturdays. It was a single elimination race to 4. $10 entry fee (no table time, no handicaps) and the room owner added $50 regardless of the number of entries. That tournament got 40-60 people every week of all skill levels. 1st place was typically a few hundred. What was nice though is for ten bucks and no table time, nobody got upset and everyone had fun...even the folks that had no chance (it was only $10). As folks got elimination, everyone hung around to play, and the room stayed full all day, afternoon and evening. Best $50 that room owner ever spent.
PS: IMHO, skip the auction. It embarrasses all those that come for fun and socialization and only slows things down (the tournament and action afterward). In larger, serious tournaments, they may be OK...but not for social tournaments.