@pshankstar you do NOT want that WSM in the link you posted above. That is the 14" WSM--you'll be very capacity-constrained, even if you're primarily cooking for yourself. The WSM is a great smoker, but if you get one you want the 18.5" version.
FYI based on your description, it sounds like you want to keep this relatively inexpensive. So the folks talking about a pellet pooper or a kamado are probably talking about grills out of your [desired] price range.
So here's what I'd say when it comes to used/inexpensive:
Offset: As I said before, an offset smoker is great, but I think you'll give up significant quality with a cheap/used version in that $50-150 price range. Thin metal, small firebox, difficult to likely manage temps and airflow well. For a first smoker, I think this will be more trouble than it's worth.
Propane or Electric cabinet smoker: The propane smoker you linked in the OP falls into this category, and Masterbuilt makes an electric version as well. Retail on a lot of these smokers can be <$200. Used, in the $100 range is probably common. These are excellent "set and forget" smokers. Easy to use, easy to regulate temps. For both you use propane or an electric heat element as your heat source, and then wood chips or chunks smoldering to create smoke. I had a Masterbuilt 40" Propane as my first smoker and loved it. Not much to really state with used ones except obviously to make sure that the electric element and controller works.
Weber Smokey Mountain or other "bullet" type smokers: The WSM is a stellar smoker. Huge online community devoted to the WSM. Rather than propane/electric, you use charcoal briquets as your heat source, and wood chunks for the smoke flavor, and manage temps via airflow. As stated above, if you go this route you want the 18.5" diameter version, as the 14" will be too small. The biggest problem here is price. Retail on the WSM 18.5" is typically around $300 or a little higher. Which means it will be hard to find a used one in the $100 range, so you might be spending a little more. There are other brands of bullet-type smokers, but once you get out of Weber, I can't speak to much to build quality. BTW the WSM will take a little more work--it's not quite as "set and forget" as a propane or electric, as you'll have to learn how to manage your fire. But the reward IMHO is worth it.
Drum-style smokers: These would be the Ugly Drum Smoker (UDS) or the Pit Barrel Cooker. The UDS is much more of a DIY model. You need to source a 55 gallon food-grade drum and have the mechanical capability to convert it using
a kit like this, but if you can do that it's remarkably inexpensive and a great smoker. The Pit Barrel Cooker is very similar to the UDS, but already made for you. It's a bit smaller, more similar in size [and price] to the WSM. Both of these smokers follow the same idea as the WSM--you use charcoal as your heat source and wood chunks as your smoke and manage temps via airflow. But both are very good options.
So the real question is whether you want ease of use, in which case the propane/electric is a better bet. If you want a little more hands-on approach, there are a few options using charcoal that are hard to go wrong.
