Other than replaced belts, anything else to look for when finding a player?

Hey, looking to get a relatively inexpensive, vintage cassette player. I've done some research and have found a lot of recommendations for the Sony Walkman. In addition, I've seen people say that it doesn't matter whether they're new or used, just so long as they come with a newly replaced belt, as even unopened players can have defective belts due to age deterioration.

Other than those things, would anyone have any other advice? Any recommended shops or ebay sellers in particular? Thanke!