Both of our boys have auctions at their shcools that I've helped out w/a lot. My younger son's school did the wine raffle as well....which I won! Sold tix for $5 each. Each family donated a bottle of wine w/a minimum value of $10. The school put together a DVD of all the classes that we sold for a flat fee: $$$ straight to the school. Not only did each class make a project (sold at the live auction) but families also donated parties. Example: another mom & I donated a day at FairlyLand (small theme park in Oakland) for the whole class...thankfully it was a small class of 8 boys! We also provided lunch & transportation & did it on a day the school was closed. Made it easy for working parents to have daycare for their kids that day. We charged $25/kid. We had some discount coupons so we only ended up paying for maybe 2 entrance fees. Also helped that Fairyland charges only $8/person to get in.
Older son's school: as an incentive, if you donated an auction item or bought a ticket to come, your kid got a free golden dress pass good for every Friday for the rest of the year. Clearly will only work if your kids wear uniforms! Teachers also donated parties w/them that sold for a flat fee. Some of our class projects were sold for a flat fee cuz if a silent auction item, they usually go for less than the cost of making them. We also had a small amount of silent auction items up for early bidding for families that couldn't attend. We have also sold class projects this way over the years. This past year, we had inexpensive wine glasses made up w/our school logo on them that we sold for a flat $25 & then you got your first glass of wine free. Both schools had their events at night & adult only as booze was sold. At my younger son's school, there were 3 signature drinks & then wine & beer all for free as someone donated it for us! Older son's school, some of the booze is donated & some purchased. We sell drink tix ahead of time as well as during the event so that the bartenders handle no money. Honestly, I think a decent amount of money comes from the drink tix alone! And at my younger son's school, the small amount of decorations were sold at the end of the night for a flat fee.
Party ideas:
Art in the park, swim parties (if someone has a pool & only open to a small amount for safety purposes w/parents attending), breakfast in bed for families, a home-cooked meal for either one specific night for one family, or auctioned off for a group by a family w/a good chef, music lessons, photography sessions, language lessons, time w/a counselor/therapist, time w/a lawyer for specific thing, ie: will writing. Teacher parties: soap making or other craft project they are good at, movie/popcorn night in the classroom, trips to the zoo.
Class projects: painted pottery, stepping stones, quilts, benches, small table & chairs, clocks, ceramic masks, planter boxes. The one item we've found does not go well is any kind of a themed gift basket. A lot of money is spent on the items in the bakset & then it generally does not go for its value.
Good luck!