Why couldn't expenses from travel undertaken specifically to sell the property be considered 'selling expenses'? Per <a rel="nofollow" target="_blank" href="
https://www.irs.gov/pub/irs-pdf/p523.pdf">https://www.irs.gov/pub/irs-pdf/p523.pdf</a>, Worksheet 2, Item 2e, selling expenses can include 'Any other fees or costs to sell your home'. Assuming no explicit language exists stating travel expenses are disallowed under 'other fees or costs', it seems perfectly defensible to include them as selling expenses.
