Cheapest T30 systems that were described as operational and in fair condition recently sold on eBay:
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0510720262 ($47; no HD, 256MB, CDROM, battery, AC)
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0534363632 ($51; no HD, 512MB, DVD, battery, no AC)
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0326137553 ($51, no HD, 256MB, no optical, no battery, no AC)
On the other extreme, the most expensive systems sold in the last month or so:
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0709528494 ($294; 2.2Ghz, 60GB HD (w/XP and Office), 1GB, CDRW/DVD combo, battery, AC)
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0465350795 ($215; 2Ghz, 60GB HD (w/XP and Office), 1GB, CDRW/DVD combo, battery, AC)
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0617602732 ($200; 2Ghz, 60GB HD (w/XP), 512MB, CDRW/DVD combo, battery, AC)
My personal opinion on why you see $200+ sales is due to the inclusion of the OS and Office suite.