Value of the Oxford Junior Encyclopedia?

It just depends on "why" your searching for the value. Many things can have a high value yet resell for next to nothing. If your after the value for a re-sell, the best place to start is going to eBay. At the search bar enter in your item. Hopefully, you will see your item. Don't click on it. Go to "sort". Click on completed/sold listings. Then click on "highest first" from there ...scroll. If you find it; what it sold for will give you an idea of its value, as far as, its desirability.

If you just want a value for your own personal knowledge...google it. Look for a website that is not trying to sell the item but rather educating on it. Many collectors have websites sharing their knowledge on their "passion". Most will either have a value listed or are more than willing to give their personal opinion. At least from there they could give you further direction on where to go for a more "scholarly" value. Good luck, my friend. Hope this helps.