Which DSLR camera do get?

I'm buying my first DSLR and i'm 13! I've saved up $500 to buy a camera and it's all my money. I can buy any camera i want to i'm stuck on deciding! I've done tons of research but i've narrowed it to four cameras.

1. Canon rebel t6 (18mp, 3.0fps, brand new)
2. Nikon d3400 (24.2mp, 5.0fps, brand new)
3. Canon eos 50d (15.1mp, 6.3fps, USED)
4.canon rebel sl1 (18mp, 4.0fps, refurbished from canon website.)

i will be using the camera for horse shows and photoshoots as well as taking pictures of my horses and my friends riding.

I'm buying my first DSLR and i'm 13! I've saved up $500 to buy a camera and it's all my money. I can buy any camera i want to i'm stuck on deciding! I've done tons of research but i've narrowed it to four cameras.

1. Canon rebel t6 (18mp, 3.0fps, brand new)
2. Nikon d3400 (24.2mp, 5.0fps, brand new)
3. Canon eos 50d (15.1mp, 6.3fps, USED)
4.canon rebel sl1 (18mp, 4.0fps, refurbished from canon website.)

i will be using the camera for horse shows and photoshoots as well as taking pictures of my horses and my friends riding. To support the answers so far, visit the link below and compare the sensor performance of those cameras.

And yes, Nikon refurbished cameras are a good deal.

Continue doing your research by visiting DP Review and read the professional reviews written on those cameras. Always go Nikon, you will not be disappointed. Consider this refurb Nikon D3300 combo with kit lens and 55-200mm.

https://www.bhphotovideo.com/...19&mxp=500" class='ext_link'>https://www.bhphotovideo.com/...19&mxp=500 Why not add the Pentax K-50 dual lens kit to your list, and wonder why you bothered with the others?

Always go Nikon, you will not be disappointed.

Consider this refurb Nikon D3300 combo with kit lens and 55-200mm.

https://www.bhphotovideo.com/c/search?atclk=Category_SLR+Digital+Cameras&ci=18978&N=4112501919&mxp=500

Why not add the Pentax K-50 dual lens kit to your list, and wonder why you bothered with the others?