I have expertise in many technologies like Selenium, proxy rotating, random user agent, phantomJS, etc..
I have many solutions for blocking issues. because I have already scraped many sites which is very high blocking like YHD CN, TMall CN, Amazon US, etc.
I know how to use proxy and how to find a solution for captcha blocking.
if you give me chance to work in this project it's great full to me and I have provided almost 99% data quality.
First, I have provided one demo scrape for that project. then you can check and then let me know to check data quality.
I have already scraped many sites like your requirement.
--> E-commerce data, on daily, weekly and monthly basis site scraping, 150 + websites
--> E-commerce mobile app, 10 + apps
--> Geographical location based e-commerce site scraping, 30 + websites
--> Lawyer lead generation ,. 30 + websites
--> Real estate lead generation, 20+ websites
--> Realtor's lead generation,. 100 + websites
--> All type of bussiness lead generation
--> Google captcha
Note: Total of 1 million data delivered on a daily basis, after finished the script