There are lots and lots of items that you can sell on eBay but I sell primarily glassware.  I am not an expert on glassware, not sure that there are a great many people that would be considered experts in all areas of glassware.  There are so many different makers, styles and types that to be an expert in all would be nearly impossible.

I just know what I like and what I think others would enjoy.  That's what I buy at auctions and list on eBay.

When you are looking for nice items to buy to list you have to be selective in not only which sales you go to, how much you pay but you have to know your competition.  Since this are has a lot of auctions, there is almost always a chance to get something nice for a reasonable price.  That is, unless every dealer in the area is there, then you probably aren't going to pick anything up for the amount you can afford to pay if you are going to list it.

EBay started out as a place where almost anyone could afford to list almost anything and get it sold.  It didn't cost a great deal to list, the choices were varied from the good to the just down right awful.  But, it was fun and got a great number of people involved in both buying and selling.  Now the cost of listing an item and having a picture for buyers to see has gotten high enough so the smaller items just cost too much to list.  For instance, if you are planning to go to an auction to buy items to list, you better keep in mind that it will cost you a minimum of $1.00 to sell it.  If it's not going to bring enough money to justify the purchase I suggest that you leave it for someone else.  You don't want to work for nothing, and eBay is work.

The positive thing about going to the auctions is that you see some beautiful glassware, some you buy and some you watch go to someone else, but you learn, you continue to learn.  It's fun, it MIGHT make you some money and you will make new friends.  Sounds like a good way to spend a day to me.