My local store offer this:

Scanning
Fuji FineScan
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Information
Used for scanning prints, X-rays, artwork and large format film. No framed art or 3D objects.
Resolution up to 2,743 dpi
Scans will make large prints.
Maximum original size up to 12.5 x 18
Files can be saved in JPG, TIFF or PSD format.
CMYK Color space available.

$4.50 PER SCAN

I own an Epson V750 Pro but assume this will do a better job for the price?
I know the only way to really know is to have some done, but I would like some thoughs for scanning b&w 4x5 negs