If you are gonna pay 4.5k for it, you should be looking into everything. . .

Start off with the title. Is it a clean title or is it salvaged. . .

As far as the mileage, 180 is not that bad, the average person drives 15k a year and a heavy driver does about 20k, so it is in the middle as it should have between 150 and 200k on it, so 180 is about right( I have a 96 sedan and it had 157k before I swapped engines). . .

Check maintenance on it, service records to ensure that it was taken care of and if they don't have them see if you can take it to a mechanic to have it checked out to make sure you wont have issues after you buy it. . .

Is it clean inside and is the body in good shape or is it all dinged and dented in spots. . .

does everything on it work, windows roll up and down, sun/moonroof opens and closes, cruise control works(if it has it), no Check Engine Light or SRS or ABS stay on after car is running. . .

You basically want to look at everything you can think of, because you are about to spend your hard earned cash on it, so you dont want to inherit someones problem car. . . Why is it being sold? ect. . .

That's what I would look into and if all of that checks out and you like the car, then get it and enjoy it. . .