just received a flyer from HB lasers in Germany. It included their annual "stock clearance" list. Amongst the goodies was a pair of regassed (and warranteed) Spectra 171's. A 24W argon and a 8W Krypton. Both for Euro 7900. Thats about $337 a watt.
Ironically, thats probably also the cost of electricity required to run them for an evening.