Before you resign yourself to spending lots of money, I'd suggest that you checkout used lenses from some of the more dependable outlets such as: KEH, Adorama, B&H, etc. You can often find a lens of your choice at a greatly reduced price.
Don't overlook your local camera store as a source of used, high quality lenses.
Hope this helps.
Bob White San Francisco Bay Area (BWO Brooklyn, N.Y.)