Possible reasons unrelated to physical condition could be: original list too high, poor marketing, unresponsive realtors (yup, it happens), prior deals falling though, and last but not least, timid buyers like yourself who think there is something wrong with a property if it doesn't immediately sell!!!

If you're going through a situation where you've had to chase down tenants to collect rent (especially if they've been repeatedly late or unresponsive to your attempts at contacting them), then it is time to evict.

(seller losing coop stock...management being unresponsive...coop board interview...etc..). 4.

I absolutely agree, but here you have a situation where the woman is unresponsive to the landlord's calls, there's an active leak, and she's locked hereself into the bedroom when the ladlord came in. 

My property manager was a month late sending the rent and after calling and leaving several messages, I fired him fearing he would get another month of rent without paying me.  I told the tenant to send me the rent di...

The only justification for this would be if the realtor is unresponsive.

If the tenant is unresponsive to the notice it's time to file for eviction.

The listing agent is unresponsive and will not provide the financials I require to evaluate.

if she does not have money and is unresponsive, call the local elderly person charity and ask for assistance.  

Very unresponsive.