Once Transplanted Hairs Are Placed Somewhere on the Body, Can They Be Re-transplanted Again at Some Place Elsewhere?

Technically, you can move hairs around over and over.  Each time you move it, you risk injury.  Trying to harvest transplanted hair, is difficult and risk permanent damage and scarring.  Each case is different and the risks should justify the means.

The technical answer is yes. If you are trying to do restoration to another place on the body or head, however, it’s best to use an advanced method of follicular unit extraction (FUE), such as my uGraft technique for body hair transplantation (BHT). It’s also known as body hair to head transplant and uses non-head hair and transplants it to recipient areas. BHT increases the donor supply using non-head hair harvested from other parts of the body and face. This includes other hair from the face such as the beard. It also allows for the chest, stomach, shoulders, arms and legs as potential sources. BHT has many benefits in addition to traditional hair transplantation but there are additional risks. It is a more time-consuming procedure that requires greater skill of the surgeon. Non-head hair is more arduous to extract. It is also more challenging to punch follicular units due to their varying degrees of angles. The procedure is also more laborious.

The technical answer is yes.  The question is why would someone want to do this?  I have had patients with bad transplants where I've removed transplants, converted to small micrografts and re-transplanted them. 

Transplanted hairs can be moved from one place to another if there is a good reason to do so. From where to where is my basic quesition seconded by why.

Hair follicles (hair transplants) can be moved more than once. For example, I have done this when patients had a Fleming/Mayer flap after transplants that they did not like. Rather than discard the transplants, they are moved elsewhere, but the patient understands that the successful yield will decrease each time the grafts are moved.

This is a bit unusual but technically a hair follicle is a hair follicle and is unaware where, in the body, it is located once moved from the scalp.  Scalp hair is thicker and tends to grow longer than hairs on the arms and legs and therefore would not match the surrounding hairs, IMO.