stryped wrote:
I have an old Ford 2n. SOmeone at work has an old 6 foot John Deer
pull disc for 200 bucks. It is a 6 foot. I would use it mostly on my
80x40 garden after using a single plow. Willmy tractor comfortably
pull this? Is it a good deal?

What Glenn said, plus,

All you are asking will depend on a number of things that you have not
included here.
There were many styles and models of discs carrying the John Deere brand.
Are all the disc axles turning free, and, all the disc blades tight and
secure, on the axles?

Will you be able to do anything with them?

It will depend on the weight of the disc assembly, the size diameter of
the disc blades and their condition, the angle of the blades, set, to
your direction of travel. As well as, the composition of the soil and
how deep you are trying to disc.
The general answer is, "yes", your tractor can probably pull the discs,
however, will it be strong enough to cultivate while you are pulling them.

Generally you pull the discs as shallow as possible to accomplish the
form of cultivation you need. They do add compaction to the soil while
they are turning it, "not" a good thing, when you are trying to grow
things.
I have several disc sets that size and a couple of them only require
about 12 to 15 horsepower or less to pull them. There were also ones
that size that only required one ox or horse to pull them. On the flip
side, I have one 6 foot set which requires a minimum of 50 horsepower to
move them once they are in the ground, however, I do not think you could
find a used set like that for $200.

The price does not seem bad, if, the blades are on tight and will turn
the dirt, but you have given no indication of what your set of discs
actually are, or, your market.
I have given away discs that size, as well as, purchased other used 6
foot sets for thousands of dollars.