Here's one I couldn't pass by, and took a few years of waiting for the seller to come to his senses about the price of it. It's a 1991 Laser Science Incorporated model PRF-150G pulsed flowing gas TEA CO2 system. I like it because it looks older than it is, and the head is not like any other laser I've seen. It has an output of a few hundred mJ at up to 130 nanoseconds pulse width and 150 pulses per second, 45 Watts average power at 10.6 microns wavelength.