Best Used SLR Cameras Under 1000 PLN: Nikon 3200, 5100, Canon 550D & Lens Options

Hi,
For a long time I used the Pannasonica DMC-GF2 compact. Now I would like to go a little further into photography and I'm thinking about buying the first used SLR camera with a lens. I don't have a big budget, around 1000 PLN, although I would prefer 900. The price must include a body with a lens (there may be a separate purchase). I plan the purchase in a month, maybe two. For the time being caught my eye:

Nikon 3200 + 18-55
Nikon 51000 + 18-55
Canon 550D + Sigma 24-70

Of course, with time I will buy more lenses. However, I do not know what to choose and whether there are still any interesting used SLRs in this price range on the market. So I ask more advanced people for advice.

I recommend Nikon D5100 plus Nikkor 18-55 VRII.
The machine is great and does not stand out from the current new models in the quality of the picture it gives.

Will anyone comment on this Canon? I have heard that Canon lenses are cheaper, besides the camera on OLX is cheaper (body - PLN 500 and Sigma 24-105 for PLN 199 or 50mm f / 1.8 for PLN 190), and for me the less, the better. Although if this Nikon is much better I will take it.

There are no cheaper lenses in Canon, i.e. there are a lot of cheap lenses but they don't encourage you to buy the quality of the image they give, good and cheap lenses in the Canon system are 3-4x more than you are going to spend and this is also not true, often it is the result "wars" what's better.
Old Sigma are of poor quality, just like old Tamrons, both companies started to make specific lenses but this is also a different price range.
The best lens from the cheap and great at this price is the Nikkor 18-105VR, or search for the Nikkor 18-70 because you can buy it cheaply, in combination with the Nikon D5100 it will be a great set.

Avoid antiques Sigma / Tamron, here in the old there are a lot of cool Nikon / Canon lenses.

Rather towards Nikon? And from Nikkora lenses? Will anyone comment on this Canon and some lenses?