Hi Ric.ror
4 bookings in 4 days on the market is pretty good, believe me, and the 2 who have seen it might have other houses to see before deciding and may book a second viewing......I have known friends and family have their houses and flats on the market for weeks before even getting a single booking, but eventually sell it.
I wouldn't be in any rush to reduce the price so quickly as the buyer will definitely put in an offer lower than your asking price, so up to you if you accept. If you reduce the price even more so quickly, they will offer you even less....being patient is the key here.
I would leave it about 6 weeks see what response you get and off to a good start already....so hopefully get an offer.
I would also take Tony's advice and try and clean up the garden a bit....first impressions really do count.
Best of luck, Ric :-)