I have an old set of Allied (Los Angelos) drill bits marked as HSS, Black Oxide finish. I'm not sure if they are worth sharpening (would require purchasing a sharpener).
I'm guessing I spent $20-$30 30 years ago for the bits. A few of the bits are very dull, and some of the smaller sizes have been randomly replaced with 'whatever'.
What's a good value 'by 64ths' set to occasionally drill metal (like a few holes each month), sometimes in a drill press, that will last me the next 20-30 years .