The sales were made before the weekend's derby win and could rise further before another deadline in April, but not beyond a limit of 36,000.
MD Alistair Mackintosh told the official club website: "It is a great testimony to the loyalty of our fans that even though we had endured a poor run of results on the field that they have backed the team through thick and thin.
"The fans have shown they don't intend to let that level of support slip and it confirms their faith in the club as we attempt to keep moving forward both on and off the field."