Sure thing frennchy11, my flame grain is one of my favorite go-to pipes. I couldn't recommend it more. A lot of factory pipes seem to be a crap shoot anyways, especially a mass producing company such as Peterson. I have heard their older pipes were made much better as well, but that along with most other topics in pipe smoking, is purely subjective and varies from person to person.
As for new or estate, I can't help you there, as I have bought all 3 new. I can say, just based on my experience, that i had no issues with the precarbonized (and some say pre-stained as well) bowls tasting foul for the first few bowls. Just make sure you have clear and detailed pictures, if buying online, before you pull the trigger, whether it is new or estate. Obviously if buying in person at a B&M, do a thorough inspection for basics like drilling, draft hole, fills etc.