Do I need an FFL license to sell guns at auction in Oklahoma? ?

I would like to hold an auction in Oklahoma and would like to sell guns. Do I need an FFL to do this? If I don’t get an FFL can I use an auctioneer that has an FFL to get this done legally?

Be sure to read the comments, you will find more information about FFL Licence

Where to find Sheriff sale/auctions of firearms in Florida?

Licensed dealer/collector interested in purchasing firearms through Sheriff sale or auction but cannot find information anywhere. Any ideas?