Of course you need to be careful that the seller is reputable and the item is authentic. Check both the seller’s feedback and try to check the authenticity of the item independently as well. I have used Purse Forum for checking against a Prada bag to a Hermes scarf (its users will use their own knowledge to verify authenticity). Putting aside the politics of purchasing fake goods, you also don’t want to pay top dollar for what you thought was real and is actually an item that is a (sometimes even well-made) imitation.
2. Be patient and use saved searches
You can find many coveted items as well as items for a discount. Some items may pop up right away while you may have to wait for other items. Try my tips for creating a saved search so you receive e-mails whenever an item is listed that matches your search. Remember my veil? Yep, I got the silk tulle for $50 from eBay (it’s usually more than twice that amount in any store) when I saw it pop up in a saved search. Keep searching and you may find exactly what you’ve wanted for less!