Like most have said, you’ll have a hard time finding any issues with them which is great if you’re buying it as a keeper. But…if you like to buy and sell, resale won’t be great unless you hide the fact, which is really shitty so don’t do it (had someone try that on me a while back)!
Can’t recall the identifying convention for blem colts as I wasn’t in the market, but turned out after a 20 minute search that the “NIB” Python was a blem resale at un-blemished pricing.