Own a T4i, looking for a second camera

[lennon33x]

Another deal is the 5D Mark II with the 24-105 for €1,300 (or $1,800$). Shutter count is 1,900. Seems like a good deal. What do you guys think? The question now is that for the same prize, should I go for a new 70D or a second-hand 5DMII ?

Full frame all the way.