Astro Products Oil Syringe

Astro Products Oil Syringe
*Price is firm.

Purchased new from Astro Products about 20 years ago and used for oil changes on my Roadster's differential. I've since sold the car and won't be using it again, so I'm listing it for sale.
When I used it, I removed the cap at the tip, poured oil directly into the cylinder, and used it.

*Important Notes*
Please consider this a junk item.
It's possible it was due to the high viscosity of the differential oil I used, but even when new, oil would seep out from the packing between the rod and cylinder when pushing the handle to inject.
I personally didn't mind it much, thinking it was a DIY-level tool from Astro Products and commensurate with the price. However, please refrain from purchasing if you are concerned or are sensitive about such issues.

The plastic pipe has hardened and discolored.
Replacement is recommended.
It will be included as a bonus.

Regarding Shipping Condition
As this item is long, it may be difficult to fit into a cardboard box. In such cases, the cap at the tip may be removed, and the item may be shipped in separate parts.
Please understand this in advance.

Please make your purchase decision with the understanding that this is a used item and an old tool.

Shipping is scheduled for the weekend.

I am a company employee and cannot check my smartphone during work hours. I also get home late, so if you ask questions in the comments, my replies may be delayed.
Please understand this in advance.
I will strive to provide an initial response within 24 hours, but please refrain from commenting if you cannot understand this or are impatient.

Thank you for reading to the end.