I need information on having items auctioned at Sotheby's NY

You should call to speak to a specialist with respect to items you are interested in auctioning. If the items do not fall within Sotheby’s perview, you should consider smaller auction houses

You should call Sotheby's directly. They will be the only ones able to answer your questions accurately.

Call them and ask to speak with a specialist in the items you want to sell.

Exactly, you have to call them to what parameters they take for items you have to auction.