Take a few negatives to a decent local photoshop and have a few prints made to see if you want to take this further. Some scanners come with attachments that will scan negatives and slides. The reversal process is done in software and I am not certain how well these handle B&W. They also do not produce the sharpest and most detailed images but might be ok for your purposes. Photoshops can scan slides and negatives. You might do better asking them about their experience with B&W. Professional equipment will always do a better job. If you are looking for a flatbed scanner designed for other purposes but want to use it mostly for negatives, I would not get any hopes up. Professional scanning equipment is the only way to go for best results.
I have inherited a box of old Photo's with many negatives . These were given to me when my Mom passed away .Some of the negs are 35mm and others are from different size film . A majority are Black & white .
Is there an affordable scanner that will allow me to discover the contents of the negatives .