Fernando,
You're very welcome. You can buy both with confidence. While they are built by the same manufacturer (Badger owns Thayer & Chandler) neither are going any where and Badger has one of the best customer service records around. Even if they did discontinue one, they are very good about keeping supplies of the parts around for years.
Mind you, I don't think Ken (Badger's owner) has any plans of discontinuing any models any time soon. The big sellers for them are airbrushes that are decades old. I had a Badger 150 that was easily 25 years old, and ended up buying a new one a few years back and passed the old one down to a young modeler I know. It's still in use today. The only difference in 25 years was the shape of the handle. The old one had an enclosed handle, while the "modern" one had an open-ended handle. The rest of the brush was identical.
As for deals, if you're in the US go to http://www.badgerairbrush.com/ and click on Garage Sale just below the main banner. They are selling demo and 'blem' brushes for cheap. Gold plated 360 for $46 or the regular stainless color for $36, or the 360-7 set with hose and bottles for $76! Failing that, try www.dixieart.com for either the 360 $89, 360-7 set $109, or the Matrix for $96.
I just bought a second 100LG and T&C Omni 4000 from the garage sale, and other than messed up engraving, they are perfectly good airbrushes.
Cheers,
Bill