When looking for a mechanical watch there is really one thing to look at. Who makes the guts, or movement is watch nerd lingo. There are movements that are sold to all kinds of makers, these include some you might not have seen before like ETA and Miyota, others you might have like Seiko. The other type movement is an "in house" movement. You are really only going to see these on more expensive watches. This is a movement that is only used by that one watch brand. My Tutor (slut sister to Rolex) uses an inhouse brand.
The plus with a movement that everyone uses is everyone knows how to service them, and likely has the parts to service them. There is not much new in watches so any good person can service provided there is no broken parts.
This brings up another thing that you need to know going in, this is a machine with gears and moving parts. Even the most expensive Swiss certified Chronograph will not hold time like that $9.99 hello kitty watch in the walmart checkout line. It is just the nature of the machine. That does not mean it will not keep time, it means it might loose a half a sec a month or so where a quartz will not.
The mechanical watch being a machine it needs to be serviced like a machine. Every once and a while, 5-10 years it will need to be serviced. Generally this is a tear down clean and re lube. If you buy a $250 Seiko be ready to spend a bit more on having it serviced, it is just the name of the game.
Personally I love mechanical watches, I would have to to have one that costs more then my first car on my wrist. I love the machine aspect of it, there are gears and such in there all set just perfect to keep the time. It really is a personal thing. Your cellphone will always have the time, but that is just not the same. It is really jewelry and don't kid yourself that it is not. The days of the tool watch are over.
That all said.
In the world of watches there is one automatic (watch that winds itself by the movement of your arm) that is a go to in the "inexpensive" watch world.
Seiko 5
For over 50 years, Seiko 5 Sports has delivered consistently high levels of reliability, durability, performance and value that have endeared it to lovers of mechanical watches worldwide. Today, with the creation of a new design and a broad new collection, this much loved timepiece is re-born...
www.seikowatches.com
Years ago they called them auto 5's. IMHO you don't need to look anywhere else for a mechanical watch. The bang for the buck is just the best, nothing else will come close.
Second place I would toss in the Timex automatics, they use a Miyota movement that is rock solid, you should be able to grab a 5 or timex automatic for sub $300
Shop automatic watches for men at Timex! These self-winding men's mechanical timepiece is designed to hold the power to keep running for 40 hours. Shop now!
timex.com
After that you will move into the $500 range and that will open up a few different areas. You can move into a great many more areas.
If you want to move into that $500+ range you can get some very cool things. Here is a good site that has some of the more smaller brands, some larger ones as well like Ball, but some really good smaller brands. Most of the mechanicals here will use an ETA or Miyota movement.
Personally I have had the hots for one of the Steinheart homage Rolex watches, the new ones are just so darn large and I have very small wrists, so I can't really pull off a larger watch, hubcap on my arm is what it looks like. Look through all the different makers on the site, there mechanical section only includes manual wind watches IIRC not the automatics.
Here at Gnomon Watches we pride ourselves on providing our customers with the finest Authentic German, Swiss & Japanese Watches, Mechanical Watches and quality accessories and watch straps to buy online and our boutique.
www.gnomonwatches.com