Inkslinger,
One thing us "newbies" need to remember when collecting is this:
What do I feel this item is worth to me personally?
In other words, are you keeping these items for yourself or are you planning on buying antiques and flipping (selling) them?
If you are planning on keeping them for yourself as a decoration then it doesn't really matter what their value is. Their value is however much you are willing to pay for an old decorative item. Some people may overpay a huge amount for an item because they absolutely love it. Which is fine. To them, that item is something they have been looking for forever. To me, an item can be worth that $500 price tag. But to somebody else it's worth it's appraised value of $300.
However, if you plan on flipping antiques, there's so much to learn it can be mind boggling at times. Spotting fakes and reproductions can be very tricky and will take years to master.
So, don't be too terribly disappointed if an item isn't worth what you thought it was. To you, it was worth the 17 bucks, and I'd say you got a great deal.