I recently bought a bare-tool Bosch mini circular saws from Toolstop in the UK. It arrived in under a week. Their prices were pretty good, but be prepared for sticker shock when calculating shipping.
I picked up a reconditioned PS-20 a while back and really like it. It's a lot lighter and smaller than the 18 volt ones. I use it at work mainly for putting brackets on networking equipment and then racking them. For this type of light-weight assembly work, the battery lasts a long time.
This is on clearance for $8.99... http://www.sportsmansguide.com/product/index/6-pc-speed-chuck-inspection-kit?a=1792100
It appears to be the same kit that's for sale at Grainger for $63.10...
Does this take into account the Chinese New Year? From my limited experience, everything shuts down in China for about 10 days during the New Year festivities, which begin on February 19th this year.
Yes, you should leave the plugs in if you are using it with an electric motor and pressure switch.
If you want to see what's under those plugs, I made a thread about disassembling the valves when I was getting my used pump running... http://garagejournal.com/forum/showthread.php?t=207510.