If there is something you seek, chances are, its on eBay! eBay has everything you could think of, vintage clothing included. It is just a matter of narrowing your search to find what you want!
eBay may seem daunting on first try, but it is in fact quite simple once you get an idea of where things are and how the site works. The main thing you need to understand is how to conduct an eBay search.
There are multiple ways to search on ebay. The first way is to click on a search item on the main search page, such as clothing and accessories. This will then take you to all clothing and accessories. You can do the same by clicking on the drop down menu next to search. However, to find what you want, the best method is to narrow your search. Instead of just searching all clothing and accessories, narrow the search to Women's clothing, or children's clothing, depending on what you are searching for. Or alternative you can type a description in the search bar, for eg. Vintage clothing, or even just vintage. This will bring up all the different clothing that has been listed as vintage at that time on ebay.
Once you have an idea what exactly you want, it is all just a matter of typing in the right search descriptions, and experimenting with different descriptions. Team this with narrowing your search and you can search for specific items, otherwise use general terms to browse through a huge range of items available.
You then can either bid on auction items, where people put bids in for how much they are willing to pay, and at the end of the auction, the highest bidder will win the item. This is the most common selling style on eBay. However, there are also Buy It Now options where the price is set and you agree to pay that specified price.
Good luck shopping!