AuctionType class
Can be english for English Auctions, dutch for fixed-price and declining-price sell orders (Dutch Auctions), or min-price for CryptoPunks bidding auctions.
GetOrdersOrderBy class
How to sort the orders. Can be created_date for when they were made, or eth_price to see the lowest-priced orders first (converted to their ETH values). eth_price is only supported when asset_contract_address and token_id are also defined.
SaleKind class
Filter by the kind of sell order. 0 for fixed-price sales or min-bid auctions, and 1 for declining-price Dutch Auctions. NOTE: use only_english=true for filtering for only English Auctions