I recently picked up some NicPro mechanical pencils off of AliExpress. They ran me $1.42 plus shipping. I got two delivered for $5.18.
These are not terrible pencils. They have a strong clip, decent knurling, brass clutch and a retractable tip. I haven’t determined if this is a sliding guide pipe. It does slide back in but not as easily as a true sliding guide pipe would be expected.
Interestingly enough, the body will also accept a P200 internal. The retractable tip functions fine. This may be a cheap solution to harden a P200 for more rugged use.
A quick click test shows that after 10 clicks it is not as precise as the P200.
EDIT - I do not know if MROOFUL is the manufacturer or the distributor.