1. You have the right to sell your share of the jointly owned property and in that event your buyer can file a partition suit,
2. However, before selling the said property you shall have to pre-empt it i.e. offer to sell it to the co-owners at the same price at which your buyer has agrred to buy from you,
3. Since, injunstion has already been granted on the sale of the entire property, you should now file a partition suit,
4. Once the property has been partitioned, you can apply for vacating the stay order applicable on your partitioned property and sell the same after pre-empting the same as mentioned above.