I believe the questions is:
Suppose you are getting the items dropshipped, for instance, you have listed an iPhone (phone) and plan to get it dropshipped soon after it sells. The way you'd be doing this is, as soon as the item sells say - $600, you will send your dropshipper the cost price which would be about $400 (example)
And 10 days later the buyer decides the phone is not what it was described and will return the item. Obviously, if you are a starter you will not have much money, so you will have to pay from your pocket. My suggestion to you is to never carry something that is too heavy for you. Dropshipping is a very risky business to get into, most of the people want to engage in dropshipping just for the sake of starting a little business. You could seriously go bankrupt, especially when you are looking at high figh branded products which cost a lot.
They will sell 100% at a good price and this motivates many people to jump into the dropshipping business, just remember, there are 100's of other people just like you who are getting the products dropshipped and on the other side there are 100's of people who pick stock up in 100's of quantities before reselling it. Obviously, the person who bulk buys will get it at a cheaper price.
You need to figure things out with the dropshipper about returns, returns just don't happen for no reason, if you are confident your product is legit, you should not bother thinking about returns much.