items = req.get(f'{self.url}items/?key={self.api_key}').json()
        if items['success']:
            items = items['items'][:count]
            if len(items) > 0:
                ids = [x['item_id'] for x in items]
                names = [x['market_hash_name'] for x in items]
                price_response = req.post(f'{self.url}search-list-items-by-hash-name-all?'
                                          f'key={self.api_key}',
                                          data={'list_hash_name[]':names}
                                         ).json()
                prices = [price_response['data'][x][0]['price'] for x in price_response['data']]
                pairs = list(zip(ids,prices))
                URL = f'{self.url_ver1}MassSetPriceById/?key={self.api_key}'
                data = {}
                for k in pairs:
                    data['list' + '[' + str(k[0]) + ']'] = str(k[1])
                print(data)
                print(req.post(URL,data=data).json())