Request parameters: q=shoe&start_price=&end_price=&page=&cat=&discount_only=&sort=&page_size=&seller_info=&nick=&ppath=
Parameter description: q: search keyword
cat: category ID
start_price: start price
end_price: end price
sort: sort [bid, _bid, _sale, _new]
(bid: total price, sale: sales, new launch time, add _ prefix as Sort from largest to smallest)
page:
