Do all resellers basically offer the same package, do any offer added value?
During the XMAS deal it's pretty much the same.
Dues the offer finish at midnight on 6 the Jan, which timezone please?
I'd assume forum, UTC time (but this might not be correct).
Is gunbot best suited towards regular trades with smaller gains or can it also work with coins that may dip then peak over the course of a week?
Depends on the strategy, but the former is more likely.
I plan to invest about £1k in an exchange across perhaps 6-10 pairs that I will let gunbot manage, Is this an acceptable model to start with?
Yes.