Yes but most of them are put in fractional currency holders. The major price guide is out of print and compiled by Darrell Luedtke. He reports that the next edition will be available online not in print.
Pretty easy to grade them. They are either damaged and FREE or not damaged and worth 25 cents to $75 retail. The people mentioned by the OP who spent high dollars for a wooden nickel might be willing to pay someone for grading. Additionally there are very few woods that meet the suggested minimum values for having them graded. The consensus seems to be that it is not cost effective for coins under the retail value of $100. Good luck whatever you decide.
@Peter T Davis Thank you for my 4th featured article. I was surprised but very happy with that and with the responses from all. I would like to see more Wooden Nickels posted here.
It is late, so I may have missed it, but one thing I didn't see mentioned is that there are 3 basic categories: officials, semi-officials, and "everything else". Officials are commemorating some sort of event (centennial, bi-centennial, community festival, etc.) and are issued by a government entity, such as a chamber of commerce. Semi-officials are similar to officials, except they were issued by a non-government entity, such as a merchant or store. Any not falling into one of those two categories is "everything else". Luedtke's book lists values only for the officials, but does include semi-officials in the listings. In general, the officials will have the most value followed by the semi's. Many of the woods issued for various events were issued in multiple colors, so many collectors want one of each color issued to form a complete set. I am a relative beginner in my collecting of wooden money, and have maybe 10,000 pieces in my collection. Some members of our club (Penn-Ohio Wooden Money Collectors) have over 1,000,000 pieces in their collection.