Your essentials dictate you would be happy with the EX spec Jazz, there are 000's out there at prresent.
You wont have any problems finding Jazz EX which come with auto - CVT-7speed - gearbox as stadard, the cruise control is fine when you can swop over.
As with any car you need to test drive before you buy, condition and invoiced service history are key, you can check up on the MOT history via DVLA . Jazz models are popular and plentiful so condition and your choice of external colour will help narrow down the choice. Go for a search around the internet Autotrader & large supermarket dealers eg Motorpoint and FOW to gauge the asking £ . Good Luck with your search
Always bargain hard if buying from agarage, and do check via HPI for any issues before signing over.