Buyer Resources
1. Intro
2. Terminology
3. Condition Hierarchy
4. Price Influences
5. What Not to Buy Used
6. Browsing
7. Searching and Filtering
8. Vetting a Seller
9. Scams Database
10. Common Counterfeits
11. Negotiating
12. Trading
13. Bidding
14. Pickups and Meetups
15. Purchasing Online
16. Taxes and Duties
17. Receiving Shipments
18. Reshipping
19. Issues After Purchase
20. Leaving Feedback
21. Useful Tools
22. Appendix
What Does "UD" Mean?
"Upper Deck."
In the context of sports cards, "UD" means "Upper Deck". Upper Deck is a trading card company founded in 1988 that produces both sports and tcg cards, depending on the active licensing agreements they have each year.
Zoomed-in logo on a 2019-2020 UD Hockey #DC-1 Brady Tkachuk card (Affiliate link).
Updated: 2025-04-30
First published: 2025-04-30
