If the property is held
available for rent during the period of time it is listed for sale, then
your travel expenses would be deductible.
Otherwise, they are personal expenses and not deductible.
See the following excerpt from IRS Publication 527:
Vacant while listed for sale.
If you sell property
you held for rental purposes, you can deduct the ordinary and necessary
expenses for managing, conserving, or maintaining the property until it is
sold. If the property isn’t held out and available for rent while listed for
sale, the expenses aren’t deductible rental expenses
