Your country style wardrobe is a pretty common piece and dates from around 1920 or so !! I say country style as it was a less expensive model than the more ornate ones with outside ornamentation !! Many of this type had simple wooden knobs !! Casters were used on everything back then !! Dining, bedroom furniture all had casters !! Price you gave for it was a bit high for most areas !! It would have maybe sold for $100. here in Texas !! Some of the old finishes they used then turned almost black over the years but could have had a later paint job !! I would be surprised if it were an original black paint !!