Hi, I have done leaflet drops in four ways.
1) Myself, when times are quiet (not done for a while now so I guess thats good!)
2) Pay friends and family (Trust worthy, but short lived!)
3) A specialist leaflet delivery company. Based in Manchester costs approx £40 per 1000 +VAT.
4) Inserted into newspapers.
The Newspaper one was definately the worst. I delivered 6000, and didnt get a single response. For normal leaflets I reckon on about 1 in 400 responding, so would reccomend that. The paid company seemed to do a good job but of course you cannot guarantee that they delkiver every single one. Works for me though.
Have fun. Os