Man if you knew some of the hidden problem machines ive seen get sent to a auction.
One from a dealer with at least a 30 day warranty. Or even rent it for 30 days before buying it with the rent applied to purchase price would be more favored. Most dealers will also do a rent to own type contract with a $1 buy out at the end. The rental co or dealer would cover all the repairs and maintenance till it was paid off.