So, I just picked up a pair of 1999 Juliets, x-metal frames with black iridium lenses. they were a display piece, and are in like-new condition. serial #J122184. Paid $300. I looked at the Vault in Monroe, OH and they have them same ones (newer model w/o serial) for $325. Are the serialized ones valuable enough to sell and pick up new ones w/o a serial for a profit, or should I just stick with what I have?