I can help with a VERY rough guestimate, if you parted this out in the classifieds (prices do NOT include shipping):
TC-4 Rev. 2 -- $25 (??, couldn't nail down an exact price, supply/demand dependent)
Maxi-Jet 900 -- $10
Heatercore From '72 Chevy Nova -- $?? (depends on any modification you've made to improve on it)
AMD AIRGA 1700+ Tbred "A" -- $25 (consider the better 'B' core is going for $45 new right now)
Asus A7N8X nForce2 Mobo -- $50+
Abit Siluro GeForce 4 Ti4200 -- $100
Western Digital 40GIG 7.2K HDD -- $35
256MB Samsung PC2700 -- $25 (I have 2 of these, paid quite a bit for both too
)
TurboLink 420W PSU -- $30
Toshiba DVD/CDRW Drive -- $?? (need more info on drive, prolly $80 for a 12X+ combo)
1 UV CCFL and Green Chieftec Server Chassis With Side Window -- $50
Tentative sub total: $430 plus shipping, packaging, time, heater core, and potential paypal fees.