Whether calligraphy works sell well depends on the consumption level of people in your city. There is a market for good works at present. For example, there is a street shop in my city that specializes in selling calligraphy and painting. You can sell it yourself or entrust a specialized agency to buy it. If you are interested, you can also open your own shop on Taobao. Then we can sell them some high imitation things, but these are things that don't match art, so the whole thing may not be very beneficial to the pursuit of art.
As for the price, your words or paintings should be linked to your fame. If it's not famous, it's hard to sell. If college students are really fierce, I suggest that you might as well open a shop to operate calligraphy and painting, and it is best to bring this mounting technology. I have been practicing calligraphy and painting for almost twenty years. I hope these are helpful to you.