You need to confirm that the equipment is owned outright by the seller (rather than being covered by a hire purchase agreement, for example). Your solicitor will do this for you.
You will also want to check the condition of the equipment. You may want to ask for servicing records or arrange for electrical or mechanical equipment to be independently tested.
More broadly, you should think about whether the equipment meets your needs and how much the equipment is adding to your costs. Would you be better off getting business premises without this equipment and then buying (or leasing) the equipment you really want?