1. Nikon 55mm F2.8 AIS Macro Lens with PK-13 Extension Tube and caps.
This lens is often used as the benchmark against which other lenses are
compared. It's that good. Ken Rockwell
Excellent Condition - $149 + $8 Shipping -Available new for $419 at B&H.
The PK-13 Extension Tube seling from $40 to $80 at eBay -

2. Nikon AF Micro 60mm 1:2.8
This lens is almost in "like new" condition
Both front and back caps
$159 + $8 shipping

3. Meike Macro Extension Tube Set
Upgraded Circuitry to work better with DSLR cameras and SLR lenses.
In Box in new condition.
$59 + 8 shipping.

PayPal only please. Thanks

The general advice is to spend your money buying good lenses and use them on whatever camera you have. Buying a cheap lens just to cover a focal length is not a smart move. That's good advice.

I've generally heeded that advice. I don't buy lenses "just because." I've always bought a certain lens because I've wanted a particular focal length. I'm covered from fisheye to 300mm with a 1.4 extender. With all the online reviews of new Nikon lenses, I haven't had even a twinge of temptation to buy one. It was just the opposite with then Zfc, Z6II, and Z8. As each one was introduced, and I watched the endless reviews online, I couldn't resist. Reading all the positive comments here added to my "need" to have one. When Nikon introduced the DSLR that looked like the Nikon F, I was tempted, so I had the get the fc. I think I favor bodies over lenses because lenses are like tires on a car, and cameras are like the car itself. I've never gotten excited about buying a new set of tires. How about you?

ONLY if you have plenty of room on your internal disk.

There are definite advantages to keeping data on an external drive, particularly data that has a tendency to grow with time. There WILL come a time when your drive is too small to conveniently hold your data and you will have to either move it to an external drive or increase the size of the drive in your computer. If you are using a Mac, the second option may not be available to you. Data may not grow linearly with time. Not only do the number of data files grow, but if you update your gear the size of the files will also grow.

If your data are on an external drive and you need a larger drive, it's simple. You get a larger drive. You copy all your data to the larger drive. You unplug the old drive and rename the new drive to use the name of the old drive. The path to all the files is now the same so the process will be transparent to your editor. And you put the old drive away as backup.