Move on and don't even give it's a second thought,I had a similar experience in 2012 the estate agent eventually told me not to waste my time as the property was for sale only for to please the banks and the individual "selling" has no intention of ever closing.
Look for a property that still has sec 23 attached, this occurs when the seller sells before the 10 year period from purchase meaning revenue claw all of the qualifying allowance used back and you inherit the original amt (percentage of the amt you pay) i.e. if you pay €100k and the sec 23 is an 80 % allowance the the section available to you is 80k.