24/28/30mm lens options

Most of the third party lenses of that era are rubbish, get the Canon, Konica, Minolta or Yashica option. Stay away from the Tokina, Sigma, Vivita, Soligor lenses of that era, Sears or etc are even worse.Yes literately Sears and Robucks if you remember the brand, generic, mail order department store lenses.

Try to get an F/2 lens rather than F/2.8 lens. All of those F/2.8 were made dime a dozen and the build quality varies dime a dozen. Get a Hexanon or a Canon FD with SSC (super spectra coating) coating rather than SC (Spectra coating) it really means double coated vs single coat. The Canon SSC and Konica Hexanon lenses are double coated on the front element to give you better clarity and contrast. You can also get a Minolta Rokkor that has better lens coating on the elements also.

A lot of these lenses will be low contrast so will require significant post processing, occasionally you will need to raise the contrast by +100 to get decent results. It's the vintage of the lens, we simply put up with less back then.

Most people did not have money for lenses back then so the kinds of lenses you find cheap are mostly junk, although there is some exceptions. We are spoiled these days with low cost lenses and some of us like myself have 6 or 8 lenses. For no good reason of course other than we can afford better lenses for cheaper prices these days.

If you literally have $100 just buy something like the Olympus 14-42 F/4-F/5.6 its a good performer for the money.

28s and 24s are less common, people didn't have much money for wide angle lenses back then 50mm lenses are dime a dozen and cheap, I tend to think 28mm isn't bad, it's not quite 50 and its not 75 either, I get caught standing to close or too far back using a standard lens so I like something slightly shorter or something slightly longer, that's just my habit though. My preference for a normal lens is 35mm, while my preference for a short telephoto is 75mm or 100...

You can get a 17 or so, but in a legacy lens they're super expensive and wasted on your camera unless you're shooting with a Sony A7. You don't want a 17mm lens on Micro Four Thirds.