Wandering about a good selling price for my epuipment?

Ok so I bought a D3200 about a year ago after my D3100 and lenses was stolen. So when I bought the D3200 it came with the 18-55 kit lens but I also bought a sigma 70-300mm F/4.5-5.6 DG OS, Nikon 35mm F/1.8, and a very nice $150 bag. So now that I've been doing some research and have some money I've decided to make the big switch and get a Canon 7D which a friend of mine is selling (body and kit lens only) and it's in great condition and he's selling it to me for $700. So basically I'm wondering what a good price would be to sell my equipment so I can buy his 7D (it's ok if I need to use some money on top of the sell to buy the body and lenses)

Take a look on eBay and see what prices they are being sold for there.

If you are "wandering about", perhaps make sure you stay where your carer can find you. There are some good treatments these days for Alzheimer's.

Why would you switch brand now? That doesn't make any sense at all. None of your existing lenses will work on a Canon.