I would typically call someone who purchases art work, a collector.
Someone who frequently purchases art from a particular artist is that artist's patron.
A Stock Broker.
Yes the word stockbroker is a noun. It is a person who buys and sells shares.
A person who buys stocks in a company to own part of
The person that makes and sells sweets is called a confectioner.
The proper identification is an entomologist, which is a person that studies insects. However, if you want to be very technical, a person that collects actual bugs, which are a type (or class) of insect, that person is called a hemipterologist.
Consumer
umm a buisness person maybe i dont know lol
A stockbroker.
A person who buys and sells goods to make money is an entrepreneur. They have created a business that will hopefully generate profits.
A Stock Broker.
A Person Who Buys And Sells Commodities For Profit
someone who sells goods someone who sells goods Supply and Demand.
An antiques dealer.
A Stock Broker.
A person who buys a lot of things is often described as a shopaholic.
Someone who buys things in bulk then sells them on to retailers.
There's several possible answers to that, but I think "broker" might be the best word.