The 31-year-old carded a round of 71 at the Diamante Country Club to end with a total score of 12-under-par 276.
He finished three strokes ahead of playing competitor John Elliott (70), and with the win became the first wire-to-wire champion of an event on the Buy.Com Tour since Kelly Gibson did so at the 99 Oregon Classic.
There was nothing cut-and-dried about this one, however. Quigley had made it known all week that he was not one to play steady golf.
He proved that theory correct Sunday, as he let a seemingly insurmountable third-round lead of four strokes dwindle away with a mixed bag of both bogeys and birdies before ultimately righting the ship late in the day.
Through the opening 11 holes on Sunday, Quigley had picked up a stroke to reach the 12-under mark, but Elliott was cruising along nicely as well, just one shot back at minus-11 complements of four early birdies.
A strange sequence of events shaped up over the next five holes, however, as Quigley played them in plus-two with three bogies and a birdie, while Elliott likewise botched the holes, making bogies at Nos. 12, 14 and 16 to go two strokes down.
Both players atoned for their suspect play at the finishing par-5 18th, however, as Elliott made birdie, and Quigley scored an eagle-three to finish a full three shots clear.
For Quigley, the victory serves as his second win on the Buy.Com Tour. He took his first at the 96 Philadelphia Classic.
Elliott, a two-time winner on the Buy.Com Tour, picked up his best finish of the year.
Quigley had an opportunity to play in this weeks Shell Houston Open on the PGA Tour as a second alternate, and would have made the field had he attended. But he chose not to make the trip, and to instead stay and compete in Hot Springs Village.
It proved to be a good move, as he ended up winning his largest check ever on the tour in $81,000.
Tim Petrovich finished in solo third place at 8-under-par for the tournament, while Pat Perez shot the round of the day, a 66, to finish fourth at 6-under 282.
David Gossett had his best finish of the year as well, as he ended at 4-under 284 with Emlyn Aubrey and Brian Kamm.
Full-field scores from the Buy.Com Arkansas Classic