I've gotten more use out of and had more fun with my 55mm f/2.8 Micro-Nikkor lens than any other piece of photographic equipment I own.
As I've been sorting and archiving some of my photography to back up cloud storage, I am realizing how many pleasing images I have made with this lens. Mostly just shooting around the house on an otherwise boring and unproductive day. Here are some of my favorites.
Prices on these lenses go up and down. I've seen them as cheap as a buck a millimeter and as high as $200. They are readily available. Since the front element is recessed, the glass on these is usually scratch free. And the 55 Micro-Nikkor is from the metal and glass Nikon lens era, so they're virtually indestructible. If you shoot Nikon F mount, this is a fun macro lens that you can also use as your walk around normal.