Darren,
That one looks in rather bad condition.
A good second hand Mk2 will usually command a price of between 1000 and 1500 squid.
I was given an almost brand new Mk2 from where I used to work, and it had all the extras with it, all the collets, boring head etc, plus cabinet stand. I found it would be too limited for normal milling, but if you wanted to do some very high precision small stuff, then it would be ideal.
If I remember rightly, 3/8" was about it's max tool capacity, and that was really pushing it to its limits, as normally there is a belting system at the back, looks like it is missing on this one, and that would limit you to the amount of cut it would take.
I swapped mine out for my surface grinder and loadsa cash.
John