If you are misled about an item or even outright lied to about it and you buy with pay pal when it arrives and you discover what you have YOU still have the expense of the return journey to the seller, no refund on this even if they see in message's you have been miss led.. A totally unfair set up as the shipping is often the large part of my payment... not happy as eBay palm it off to pay pal every time ...
It's just one of the standard pitfalls of online shopping and there's not a lot you can do about it, but even if you did all of your shopping from B&M stores, you'd still be up for car and fuel expenses if you had to return an item for whatever reason.