A domain with 50 plus uniques a day is worth FAR more than a measly $100. Depending on the extension and category I would say 50/uniques/day to be in mid x,xxx to mid xx,xxx range, with low x,xxx being on the very low end.
50/day is more traffic than probably 95% of the names for sale on this board.
Good quality real traffc is so hard to get that even a few uniques/day is good and valuable. When 'tasting' a name, just 1 or 2 uniques over the 4 day tasting period is a good reason for me to keep it.