This trailer is was built before 1984 and later than the late 70. It looks complete and fairly good shape from what I can see. Count on spending $800-$900 for tires
. Count on another $300-$500 or more for repairs and upgrades. Then you have check floors for rot. Floor repair not too expensive but dirty and a PIA if you have not done it before. Also check the door for fit and the frame for excessive rust and cracks.
A stripped out S-13 rolling shell with title
is worth well over $1K. I did not price this trailer since not seeing it in person, just giving you additional factors to consider.