Many males have a testicle , which is larger then the other one.
Any testicle problems should be taken to a doctor. There are many reasons for differences. See the link below.
Where can you sell a testicle in Kansas
As long as blood is pumping through the testicle then it should have a pulse, the left testicle should have a pulse too.
They don't. There is no market.
Nowhere, there is no market for testicles.
you might need to go tell the doctor that when you put your finger up your bum and it bleeds that's when your ball tingling.
same as the left, making sperm and semen
A boy with an undescended testicle should be taken to a doctor as early as possible. See the link below.
The left testicle does the same as the right testicle, which is to produce sperm cells. Combined both testicles actually make 1,000 sperm cells a second. Although, you must take into account a large number of those cells will be deformed / unusable. (About half)
Go see a Doctor.
It is quite normal to have one larger testicle. It is estimated that in about 65% of men the lower hanging testicle is the left one. This is due to differences in the vascular anatomical structure on the right and left sides.