depends on what it is. i suppose you're wanting to do freelance? sometimes i've heard of people doing $50 or $75 a sheet. sometimes, they bid "hours" for a set of drawings, so no matter how quick or slow they go, it's all the same, based on $30/hr or something similar. just depends on the extent of the project.
i've seen guys charge $3,000 for a full set of shop drawings, plotted and all, about 30 sheets worth. but these guys know what they're doing, and it's 100% right the first time.
What kinda project do you have on the table? or what type of work are you looking to do?