how long is reasonable to sell a home?

[Dennis Lau]

I know that it varies by state, location and neighborhood, but I was wondering if there is a general rule of thumb on how long is considered reasonable to sell a home? I have a home in oklahoma, built in 2006, 1800 sqft priced at around 175k.  Its being listed by an agent so it is on all the major sites. Right now, I'm about 25 days in, and we had only 1 showing, and only 12 people 'favorited' on zillow.  Is this a bad sign that the home is overpriced?

Should I look at reducing the price, or should I wait for another 30 days?