Should I buy a used flat griddle?
If we are talking about the cook surface then my money tends to go towards a used one, as long as it has been properly cleaned over time and taken care of ( i.e. few scratches, dings or buildup). That being said a used one that has been taken care of will also work better for cooking because of the oils that are already seasoned into it. The thing to watch for in buying used would be the underneath, make sure the lines are good and that the underneath is well maintained. Buying used will not only save you some money but also some time and frustration from dealing with "sticking" issues which can come from using a new flat-top. Plus "used" adds character, but that's just my opinion.