I've never had a smoker and want to get started. I'm trying to decide between these two used options I found: older model WSM 18.5" (about 2 yrs old) for $100 or an 8mo old 22.5" WSM for $225? Anything to check/ inspect when buying a used smoker? Or should I just bite the bullet and get a new WSM? Either way - I'm buying myself something as a graduation present for finishing business school!!