I have a centennial FW that my husband bought me. He paid a lot for it, but that was more for the condition than for the centennial badge. I know there are a few Texas Centennial FW's that were sold at the Texas State Fair as I remember. Those go for big bucks. The last one I saw on eBay went for $12,000 but that has more to do with that fact that there are only a few of those sold and probably a lot fewer that have survived.
301's here are still pretty inexpensive in general. I have a trapezoid table I bought a couple years ago. I got it from eBay for under $200 shipped to me. I haven't seen one lately so that's the closest number I have for that. You might check the sold listings on eBay to get an idea of value. It can take a while but everything seems to come up for sale on eBay sooner or later.