from steampy.client import SteamClient
# import re
steam_client = SteamClient('апикей')
steam_client.login('логин, 'пароль', 'путь.maFile')
listings = steam_client.market.get_my_market_listings()
info = listings['buy_orders']
price = info[next(iter(info))]['buyer_pay']
print(price)
{'4027119169': {'order_id': '4027119169', 'quantity': 1, 'price': '15,73₴', 'item_name': 'StatTrak™ AK-47 | Fire Serpent (Well-Worn)'}}