I think your safe if these are the pick of the litter. If you have a particular one your wondering about just do a CLS and see if any have sold recently. I always look at key chains. I've sold a couple for over $100 and several for over $50. These were mostly designer named ones and one old Cheverolet logo. I have a box full of vintage 1960's-1980's ones also. Something else that needs to be sold as a lot. So, for the most part they aren't worth listing as singles unless you have a high end designer signed one or you want to spend time listing many items for between .99 and 9.99, something I wouldn't want to do. You should always be on the lookout though because some of them can be worth good money.
ps- I will say, keep an eye out for the old license plate key chains. Some of them are worth their weight in gold, and then some, literally.
key chain license plate | eBay
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