iPod shuffle or nano for children

Hi all! My 8 year old daughter has asked for a music player for Christmas, and we don’t really do phones/iPads with our young ones yet. The adults in the house use Mac’s and iPhones, and we used to use iPods.

I was thinking of getting her a “new” shuffle or nano from eBay. Any reason I shouldn’t do this? Since they are now “obsolete,” will I have trouble loading them with music from my Mac iTunes? Should I get one in particular?

Thank you in advance!