This is the first error in a while ive seen thats really an error. Beautiful coins and all so far need to be graded to maximize value. There are many people on cointalk who can walk you through the process.
I'm not sure about the Lincoln cent, but I'd definitely submit both quarters. Using USPS Registered Mail is the best way to go because the package must be signed In & Out by every employee who handles it. It would be a good idea to insure the errors for their retail value. Wouldn't you think so @Fred Weinberg ? Chris
Everyone's risk level is different. Maybe submit at a show depending on your location? Registered is best. My preference is priority mail with delivery confirmation. I don't insure unless 5K or so in value.