First, other than the shutter issue, are you happy with the lens? If so, probably better to invest in a CLA than to buy another lens. Most of the really inexpensive lenses will be older Wollensaks or older press lenses (typically 127mm Ektar or 135mm Optar). You won't find a lot of really inexpensive 210mm lenses. If you do, it will probably need a CLA anyway.

I think going rate for a CLA is more like $80 (not $30 or $50) but I could be wrong. Lot's of good repair folks and all deal very reliably by mail. Flutot's is fine; so is Paul Ebel (paulebel44@yahoo.com).

Only drawback is going without your lens for a while.