What is an html code for a marketplace?

[Drake]

i am trying to make my own online business with html i basically need to make a listing page like craigslist or ebay where people can submit there own stuff.

[bbearman]

Unless you want to be doing an awful lot of maintenance or do not have inventory changes you will need more than HTML. You will need a web server environment like LAMP or .NET. To build an entire site it will be a large task considering the way you asked your question. I would suggest building and ebay or amazon store and using their tools. Another option is to get a hosting provider that has application installs with an open source platform like Magneto or OpenCart.

[Agent]

Unfortunately, you can't do this through HTML. You need to learn other languages to process data like this. HTML/CSS are the languages that place and position information on the page, not the one that translates and stores what is submitted.

You need to learn a language like PHP or ASP. Personally I recommend PHP, it's more widely used (Google, Facebook, Yahoo, Wikipedia and Wordpress all use PHP), compared to ASP, which seems to mainly be used by Microsoft owned companies (which makes sense, since Microsoft created ASP). The main important factor in this case is cost. PHP is free and open-source, whereas ASP is not. If you were certain you could make significant money with your website, you could go with ASP, but the benefits are not worth it in my opinion.

Javascript is also very useful for websites like the one you suggest.

Lastly, you'll need to know a database query language like MySQL or MSSQL. MySQL is the free, open-source one, and MSSQL is the commercial one that you have to pay for made by Microsoft.
MySQL is more widely used, just like PHP. This means that for both MySQL and PHP, there will be more support and examples online that you can learn from and get help.

I suggest you use a YouTube channel called thenewboston, I learned PHP, Java, C++ and Javascript from that channel, and I've looked into their HTML videos so I know they're good as well.