I have started buying some things from eBay — including Tarot & oracle cards — and I noticed that the energy from these things (especially the cards) are very strong. Which is why I no longer allow seekers to handle the cards but if I do I have a “special set” that is for seekers handling only!! In other words, I won’t rely on them for my regular work but if someone wants or needs to touch the cards — those ones come out to play!
I suggest NOT to buy Tarot or oracle cards, if they are used (slightly used can be okay if it was just a look at the cards and not much else), because the energy of the reader combined with the distaste/disrespect for the cards may come through in a reading.
The two slightly used card decks I received (one was a bonus to buying a book so it didn’t matter) both have energies and smells that do not allow me to use them for reading purposes.
So if you are empathic or clairsentient, like myself, avoid buying used cards. Having said that, I did buy a “like new, slightly used” deck and the energy is perfect in them. I suspect they didn’t really use them OR respected the cards. This was a knowledge based choice that allowed me to use my intuitive skills to choose the “right” used deck. 🙂 (my psychic abilities are not turned on 24/7 and I try not to run my life based on them either but sometimes it’s useful!! *grin*)