Hi Mippy, welcome to Muppet Central. I wouldn't have any idea how much they would be worth, you're probably better off seeing how much people would be willing to pay. The best way (I find) to do this is look for similar items on ebay and how high the bids go. I have recently seen the Kermit bow biters STILL(!) available in a local shop so I wouldn't expect them to fetch a too higher price - but who knows. Good luck!