Ah, I didn't realize there was a switch in auction format...
Yeah, I really like the silent auction method. If you want to mix the three methods together, garage sale tables, silent auction, and live auction for the more desired items that might also work well. As long as it doesn't get too confusing.
Garage Sale= Common Items that sellers have multiples of or are fine with a set price
Silent Auction= for those that want to auction their semi common items
Live Auction= Highly desired items
Or just keep it simple and silent auction the whole lot like we used to.