The general rule of thumb is if you haven't received significant showings, and what is "significant" also varies by your market area, within a 30 day time period, then something isn't right about your listing. That something can be any number of things (price, the way it's being marketed, etc.) There is an old saying in real estate "Price Fixes Everything"...so it just depends on how much equity you want to give up.
Unfortunately as a FSBO you are already placing yourself at a significant marketing disadvantage since according to a 2006 survey of buyers and sellers properties sold by a Realtor sold 16% HIGHER than properties sold FSBO. Since most markets average 5% to 7% for listing fees, a FSBO is leaving 9% to 11% of their equity on the table.
You would be best served to find a Realtor who is a specialist in your market...preferably a Certified Residential Specialist (CRS). The CRS, also known as the PhD of real estate, is the highest designation awarded to professional residential Realtors and though less than 4% of the over 1.3 million Realtors qualify to receive the CRS, they do more than 25% of all the residential sales in the country each year.
Sorry, but I think you are kidding yourselves. You are not agent assisted, otherwise you would know that if you are receiving showings and no offers that you would need to reduce your price.
With all due respect, what makes you think that posting a question like yours in Trulia is the same as someone that
1. Knows the local market
2. Knows your property
3. Knows your situation
IMHO it would be invaluable for you to have someone with the above knowledge...but you opted to take another route.