Not sure if this is common knowledge...and you know what they say about ASSuming anything!!!
With a C&R FFL, you are entitled to "Dealer Pricing" with several firearms retailers.
I've had my existing accounts changed to "Dealer" accounts at Brownells and MidwayUSA for example, and they give you a nice discount off of their regular prices.
Also, I sent in my 03 FFL to Century Arms and now have access to "Dealer" pricing and can participate in their auctions.
The $30 fee is worth it just to get these discounts...the amount of the discount varies but 25% is not uncommon!
Example at Brownells: An AR-15 Lower Receiver Vise Block is normally $51.99 but is $38.49 with dealer pricing...not bad.