I charge between $1,200 and $2,000 depending on if you want lights, fiber optic lights, circuits with flickering and flashing lights, original model parts, machined brass or tube brass parts, pyro or hero, mounted with base, pilot or no, etc...
I'm undercut all the time - I totally don't mind. I charge what my time/experience/knowledge is worth to me, and there is always someone else out there that will do a job cheaper - it may not be as nice, but if it's worth it to the buyer, more power to them! Heck, I'm sometimes releived when someone balks at a quote - more "me" time at the model bench, baby!