Too much. How old is it, 25 years old?
Yes they are built like tank and high quality. BUT (BIG but here), they are heavy, slow, hard to turn, and obnoxious. Basically, they make mowing a CHORE. I know, I used one for a summer just because even though I had much better mowers.
Look for a Toro, Honda, Snapper, anything else really. They are not fun or easy to use. You will hate it.