The sale site says $30 entry fee per head and 12% commission. Plus you have to be a member of the California Suffolk & Hampshire Breeders Association, which is $25/year. All sheep must have a health certificate (our vet charges $30 for the certificate for any number of animals) and you have to submit scrapie/spider DNA, which means testing unless you know for certain that both sire and dam are RRNN.
Looking at this, I think my $100/head estimate is a bit low... And that's just the sale fees. Doesn't include fuel, hotel, food, bedding, etc. from the sale itself. I didn't consign this year. Figured after I took out the large cut that the sale costs, I could get more for them off the farm and/or selling online. I may try it again next year though, seeing how good these Maximus and ExGames lambs are turning out this year.