Should an amateur photographer sell their photos?

I've begun to take photos on a camera my dad had, I think it's a Nikon D5200.
I've managed to take some good ones, which look pretty cool, and people have complimented me on them. Should I sell these photos as they are beginner ones for me? Where should I sell them? If not, why?
I'm rather clueless on this type of stuff, thanks for every good answer!

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Can and sd card break a Camera's sd card slot?

I've recently baught an 8 GB SanDisk sd card and it worked in both my friend's Nikon and my school's Canon cameras, but when I tried it at my Canon camera, the card wasn't working. It said my SD card was locked though the switch says otherwise. I've tried multiple cards and they were said to be locked. My camera used to work just a few days ago. Could my new SD card be the problem?

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Autofocus will not work on Nikkor 105mm macro and Nikon D610?

Autofocus will not work on Nikkor 105mm macro and Nikon D610?
Added (1). I had been using the 105mm (older model) on my Nikon D610 without any trouble and then I lent it to a friend with a D5100. I got it back and the autofocus won't work and the aperture will not adjust through the dials, only through the ring on the lens. How do I fix this?

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Nikon D5200 it is! Any last recommendations before I make the big investment?

I finally decided, after a long thought-out process that the camera I want is the Nikon D5200! I am simply doing photography as a hobby for now, I've taken many classes and now it's time to get even more experience! Now on my own with my own camera, yay! I will be taking fun photos for friends and family at no cost, just for fun:) I hope I'm making the right choice! Just need some last minute opinions based on experience! Thank you!

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Which camera i should go for? Nikon or Canon… My budget is 30000?

first i had choose Nikon d5100 bt m lill bit confused

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Nikkor 35mm or 55-200mm? For better videos?

I have my nikon d5200 with 18-55mm kit lens. I want to go for any of the above lens. My requirement is to achieve good videos for travel videos or documentry.

If I should go for a prime, Should i consider 50mm 1.8g also?

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To all the camera experts out there, which one do you mostly recommend?

I plan to take picture of the night, sunsets, beach, nature pictures, dance pics, and so on. I just want a really nice camera.

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