Since VPS providers keep going for that sub-$5 range, how many low end VPS boxes do you currently have?

I currently have two myself for a slave DNS and monitoring.

The DNS is with ramhost which I've had for almost a year and the monitoring is with QuickWeb - two months now.

Of course a good place to find some if you haven't already (be careful and do research): Low End Box - Cheap VPS Hosting Providers Listing & Reviews - lots of listings.