Questions about 1953-54 Briggs Meats Senators Regional Baseball Cards

[Dmurry]

I'm new to this forum and need some advice on appraising and possibly selling 5 Briggs Meats Senators Regional baseball cards from 1953-54. My uncle collected them as a kid among many other cards, and because he is not computer savvy, asked me to help him out. The cards include: Johnny Schmitz, Robert Oldis, James Busby, James Vernon, and Mickey Grasso (Shortprint).

As far as I've seen, these cards seem to be rare and not always in the best condition due to original hot dog packaging, and I have checked the baseball guides, however I know market value can be quite different. My questions are these:

1. Where can I get them appraised for a decent price?
2. Should I get them graded, or since they are not in high grade condition, just authenticated?
3. If they are just going to be authenticated, do I need to use pSA or BGS, or use a lesser known grading service?
4. What is the best way to sell them: ebay, auction, dealer?

I would truly appreciate any help that anyone can give me. thanks in advance