1. Don't assume you have to buy name brands. Antique furniture that has been well crafted and held up over time can be a great deal when you consider the cost per year value of having an item that could last generations.
2. If the item isn't described in full detail, ask questions.
     I suggest you ask:
Is the furniture made with mortise andtenon joints or with less sturdy joints that could result in wobbly furniture in short order? By the way, don't asume name brand furniture is automatically made with high standards. Some of the best names out there are constructed with some shoddy manufacturing practices.
   Ask if the pieces are solid or if they need some "work". Honest sellers with solid feedback should answer your questions accurately.
 Do your homework. Visit stores, see  the items in person and then return to Ebay and try to get a better deal. Be sure to factor in shipping.
If you buy lacquered or veneered furniture,  it makes sense that you'd want a thicker layer. After all, when you paint a room or refinish your deck, you want extra layers of protection. Same thing with furniture. A thin layer of veneer is likely to scratch or chip more easily, revealing the bare surface underneath. 
      Look at books and free websites on buying and choosing furniture. One book I reall like is called Best Furniture Buying Tips Ever. Although the title is a bit over the top, the info is solid. It'll help you find deals and good, heirloon quality furnture in all sorts of stores, not necessarily just the more commonly known brands. The info may surprise you but you will be likely to end up with furniture you love (I did).
     Steer clear of particle board and be aware that some of the fanciest styles may only have particle board underneath