I have some photo negatives and want to know if there is a scanner on the market I can use to develop the negatives also with scanning old photos and some negtvs from the late 1800's.
There are scanners that can "develop" a negative, though most are designed for 35mm negatives. Canon has a flat bed that scans negatives and I'm confidant that Epson does as well. you may run into issues with regard to the negative size.
Epson has the following models: V500, V330, V700, V600, V750
Canon has 8800F, 9000F.
As you can see Epson offers a wider range thus hopefully one would offer you the flexibility of scanning varying sizes of negatives.