Resources
Where To Buy Sports Cards
Huge selection of sports cards for sale and very safe
Most popular option among collectors
There are many online auction options
Where To Have Your Cards Professionally Graded
The most popular option for modern collectors
Professional Sports Authenticators (PSA)
The most popular option for vintage collectors
Popular with vintage collectors, great for tobacco cards
Where To Check Sports Card Prices And Values
This is a trading card scanner and price guide app that allows you to easily identify and track the value of your collection

A great resource that aggregates recent sale prices of graded cards from eBay and other top auction sites
Professional Sports Authenticators (PSA) SMR Price Guide
A decent option for PSA-graded cards but I use it more to get a rough estimate as recent market prices can be much different
Where To Insure Your Sports Cards
Antiques & Collectibles Insurance Group
You never want to experience your prized collection being stolen or damaged and these folks can help ensure peace of mind with their excellent coverage options--something that isn't easy to find in this hobby
Sports Card Shows
National Sports Collectors Convention
The granddaddy of all sports card shows held annually
Promoter of several shows on the East Coast
Large monthly show with top dealers from all over Florida
Greater Boston Sports Collectors Club
Huge show with dealers from all over New England