eBay lets shoppers rate and review their buying experience, which means you don't have to shop totally blind! If a seller has over 30K sales and 98% positive feedback, chances are you're in trusted hands. Now, that's not to say that a new seller with barely any reviews and a slew of designer goods up for bid isn't trustworthy, it's just worth a bit more research.

Check out all the items a seller has, examine the pictures and the type of listings, descriptions, prices — maybe someone is just cleaning out their closet and has a variety of awesome pieces that just don't fit in their life anymore? Or maybe it's 15 versions of the same handbag? If it's the latter, might be best to keep on shopping.

One of my favorite sellers is brand_jfa. They're a Japan-based eBay store that carries an amazing variety of authentic designer pieces and has great customer service, and you can often score a pretty awesome deal (like this pre-loved Louis Vuitton bucket bag)!