For a seat bag, any chinese crap is sufficient. For the torque levels used on bikes, chinese crap tools are also sufficient. If you only need chinese quality stuff, the easiest place to get them directly from the chinese factory are sellers on ebay or dealextreme. It usually takes a couple weeks to get to you because it is shipped directly from china but it's hard to beat their prices.

I got my seat bag from ebay for $5 shipped. It is a Roswheel brand.

I got this multitool http://www.dealextreme.com/p/chromed...tool-set-18472. It is actually very well made and has a lot of stuff. The chain breaker is pretty good; have used it 3-4 times and has always provided plenty of leverage. I have used the spoke wrench to true 2 wheels without any problems.

If you ever run out of patches, I recommend getting the 48-patch kit from dealextreme for $3.37. Usually there will be an ebay seller that tries to undercut dealextreme by a little. I have used over half of them without any failing.

For pumps, if you only need to get it to 70 psi, the Topeak Pocket Rocket mini is perfectly adequate. If you need it for a road bike, you might be able to get it up to 80 or 90 psi if you are patient and energetic. If you only need 70 psi, Harbor Freight had a short foray into selling bike accessories maybe a couple years ago. They sold a mini pump for $5 that had the same nozzle design as the Pocket Rocket. Last year, they gave up on that market and clearanced all of their bike at 75% off. For a $1.25 pump, it has never failed me. Your local Harbor Freight may still have them on clearance.