Thought I'd replied to this?
Video looks great, found an open box one for just over £650 body only, good deal?
What type of lenses do I need to look for on this camera as it's a full frame?
i paid £1000 for mine new without a kit lens.
So you want to look for Sony - E mount lenses those will fit natively to the camera body.
There are some great budget brands of lenses that make native E mount lenses too. Tamron and Sigma
Are you new to photography like i was?
If so there are a couple of majorly important numbers when it comes to lenses.
#1 is the Aperture(F number). You will see lots of different numbers but the important one usually is the maximum (lowest number) aperture. So for example when you are looking at the lenses if one says it is an F1.8 and another F4.0 the F1.8 generally will provide more flexibility, sharpness and a more beautiful background bokeh because it means the lens can let more light into the cameras sensor. Below is an example of what i mean.
The other number that is important with your lens choice is the Focal length this is basically how "zoomed" the lens is.
so a really low focal length such as 16mm would be a super ultra wide view of everything around you. 50mm is much less wide but it's not so wide that you don't get a lot of environment. Most of my images you see were shot on the Sony 1.8 50mm.
i think 85mm is a much revered focal length for portraiture and anything between 200-400 is lovely for getting a nicer zoom onto your subjects. I personally after playing around a lot with the camera and falling in love with photography have decided on getting a Sony 70-200mm F2.8 Gmaster lens because it has a relatively good aperture at F2.8 and the 70mm-200mm zoom gives me so much flexibility to take all sorts of different shots without changing the lens.
below is an example of different focal lengths.
if you don't want to break the bank with lenses then you should get yourself an M42 - sony E mount adaptor and get some old vintage lenses from the likes of zeiss. Some of them still produce absolutely lovely images and will get you started for much less money. Though you would eventually want to replace them for some quality of life improvements such as autofocus ect.
Also my apologies if you already knew all of the above. I just wish i was more informed when i purchased my camera regarding what the different lenses did.
EDIT :
I see you have extremely good trust so you are more than welcome to borrow my 50mm F1.8 if you would like to try it before choosing a lens. I would be happy to ship it the second my new lens arrives of course i would need to back after a few weeks.