Yeah, we really have to be careful about how we describe things, as buyers will often use those descriptions against us. A lesson learned for you, and trust me, none of us are perfect, we all make mistakes.
Its also easy to make mistakes when describing things if you're listing a lot of stuff for hours on end. I start to get brain fog after so many hours of doing it.
From my own experience with selling vintage items, it seems buyers are more interested in how something looks anyway, more so than working condition. Listing something as "Non-Working", didn't seem to affect my ability to make sales with vintage goods.
As for your returns policy, you really should reconsider accepting returns, as stating you don't accept them just instills a sense of mistrust among buyers. There's really a psychological aspect to buying and selling, its not all just numbers. If you instill a sense of trust right from the get go, then buyers will be less likely to look for reasons to complain. They see things like "Returns Accepted" and instant feedback, and they assume you're legit, as both instill that sense of trust with potential buyers. Its that first impression that really counts.
Anytime a buyer isn't happy, I've always accepted returns, and always refunded when they did so, no questions asked. In some cases, those same buyers even came back and bought again, and I made money from them anyway.
And don't get me wrong, accepting returns on the types of items you sell is likely to end with a bad loss, but you can still try and find a way to balance the needs of buyers with your business needs as well.
