This is an older bike. You might call it vintage.It is a late 80's Centurian (later bought by Diamond Back) Sport DLX. It is a 63cm frame so this is for a larger person probably 6' 2" to 6' 6". I am 6' 4" and rode this bike for 25 years. I have upgraded to a newer bike and no longer need this one.
This one is far from perfect but has a lot of life left in it. The frame has about as much nicks and scratches as you would expect from a 25 year old bike. The only major problem right now is the outer chain ring (the larger front gear) is bent and the chain catches when you pedal. You may be able to replace the chain ring itself but it would probably be worth replacing the entire crankset and bottom bracket. I don't have the tools or the patience to do it myself or I would have repaired it.
I did replace some components the last year or two with new parts:
Shimano Hyperglide 6 speed freewheel (28, 24, 21, 16, 14)
Shimano Rear deraileur - basic model
Shimano brake and shifter cables
Shimano cable housings
Bontrager rear tire, Performance Forte front tire
Performance Forte saddle
Specialized black cork handlebar tape (I admittedly did not do a great job, but it is serviceable for a while)
Here are specs in addition to the above:
CroMo frame material
63cm frame size
58cm top tube
80mm quil style stem
Suntour crankset, front deraileurs and brakes
Crankset size - 52, 40
Cranks - 170mm
Tires - 27 x 1 1/8