What I would do is research the sold prices and whether or not they're actually selling, like fashionu4euuh said. Once you've determined that, that will probably give you a better idea of what will be the best option.
When purchasing future inventory, it's always a good idea to look at the Sold section to see a) whether or not this particular item is selling, and b) what price it's selling for. If there are 90 listed for sale but only 3 have sold in the past three months, it's probably not worth spending the money on unless you want to have it sitting around for a long time, for example. But if it seems to be selling on a regular basis at a price that would earn you a decent profit, it's probably worth investing in. You make your profits when you buy, not when you sell. For example, a couple of years ago I bought a set of three Christmas ornaments from a church rummage sale for a total of 75 cents. I held onto them until that Christmas and then listed them for $8 each and ended up getting $24 total for something that only cost me 75 cents. That's a worthwhile investment. Something that costs $5 to buy and then only sells for $8? Probably not worth it.
It's all about sourcing wisely, seeing what is selling and for what prices and then using that as a basis to decide what is worth getting and what isn't.
