My First bag was a Maxpedition knockoff bag for like $30 bucks probably made in China or Mexico. No Name Brand on it! It serves its purpose for a small keep in the vehicle type bag.
The second and large main bag I wanted was a
Maxpedition bag but I just couldn't justify the money for one right now so I settled on a
Red Rock Outdoors Large Assault pack similar to this for around $60.
It has several small bags/pouches I got off ebay for $10-15 that I've added to it via the MOLLE webbing system.
When I got started I went to youtube and typed in "bug out bag" or "get home bag" you can pretty well sort through the good and bad videos.
Here are three I like and will give you a good idea on where to start. This guy has two different channels and is well worth a follow on youtube. IMO
[youtube]https://www.youtube.com/watch?v=hBzRraMz5NM[/youtube]
[youtube]https://www.youtube.com/watch?v=5_OLFDyXcRM[/youtube]
[youtube]https://www.youtube.com/watch?v=PIPEUGhcmH4[/youtube]