Though there is agreement of sale with third person and suit for execution of the agreement is pending in Court, the right of workers to recover epf is preferential right. Section 52 of Transfer of Property Act, 1882 prohibiting sale of property in respect of which suit is pending is not attracted here. You can very well participate in auction and bid for the property. The agreement holder can also bid for property. If your bid is highest, you will be get the property. If bid of agreement holder is highest, he will get the property and the deposit by agreement holder with pf will be adjusted against bid amount.