Another Question on Refinishing or Not

I know this topic has been discussed quite a bit, but I guess to
refinish or not depends on the present state and potential value of an
antique item, and I'd like an opinion on what to do with a couple of
items I have. 1. An oak, Wernicke 3 cabinet Stratford made barrister's
bookcase with ogee base which has been much abused and really needs a
good refinishing. Not paint abuse, but so many scratches and tiny
gouges. It's structually sound, but also missing 2 of the glass doors
to the bottom cabinets (D 12 1/2), but the top cabinet has the nice
leaded glass lattice on it. If sold at auction, I am told it could
only get 200 Canadian. Would it then be worth more for me to try to
restore it (also try to buy 2 doors), or would all this lower the
value even more, even if a good job was done?

2. I also have a weird looking little sewing cabinet/box that is
shaped a little bit like a barn, with the roof opening up and sliding
back from the edges in 2 pieces. It also has many brass thread spool
holders/brackets on the lid and a carrying handle in the middle.
However, though also structually sound, it also is in terrible looking
condition with varnish missing and ugly water stains all over the
reddish wood (cherry?). I'd really like to make this little item
better looking (though it hasn't been appraised), since it would be
much easier to do than the bookcase, being so small and portable. I've
had experience refinishing various kinds of furniture, but none as old
as these 2 items, and I wouldn't want to devalue them in the effort. 
Thanks for any advice.