Don't place too much stock in open houses; these are not where your buyers are going to come from, unless they're accompanied by their agent. Most people who go to open houses are just beginning to look and have a longer time horizon than you do. Most have not gotten pre-approved by a bank, so most really don't know what what they can realisitcally buy. Many who come through are just curious.
Your buyers are going to come with a Realtor who is their buying agent. The Realtor will have ensured that her clients got pre-approved through a bank and are ready to buy. She will show her clients properties that meet their financial and personal criteria. Two weeks is not a long time for a property to be on the market, but if you're not getting any showings by agents, then your agent needs to discuss with you why, as she has the best information. Good luck!
So, your agent is not only your best source of advice, but your best source of information, as she should be following up with agents who sho your home for feedback. What are they tell your agent about prices, how it shows, any issues they see, etc.?