We'd Love To Hear From You
Contact Us
Whether you have a question about an order, are searching for a specific card, or are interested in selling a collection, we're here to help.
Customer Support
Questions about an order, shipping, returns, or your account? We're happy to help.
Looking for a Card?
Searching for a specific player, rookie, parallel, autograph, or graded card? Let us know and we'll keep an eye out.
Selling a Collection
Have a sports card collection to sell? Contact us with the details and we'll discuss purchasing opportunities.
Contact Information
Email:
eric@sidelinementality.com
We typically respond within one business day.
Please include your order number if your question is related to an existing purchase.
Before You Contact Us
- Include your name.
- Include your order number (if applicable).
- Describe the issue or question clearly.
- Attach photos if you're reporting shipping damage.
Need Something Specific?
Looking for a particular card?
We're constantly adding inventory. If you don't see the card you're looking for, send us a message. We may already have one coming into inventory or can help locate it.
Last updated: July 23, 2026