in my opinion this is too cheap to pay. a person can deliver between 100- 200 leaflets per hour. so at max speed (this is only in close housing) it will take 5 hrs min to deliver them. 5 x min wage is over £35 ish and that's without any overheads added for the organizer...
i've had a bit of experience with leaflet distribution companies and have always found the cheapest ones a nightmare to deal with and that they simply do not deliver the number of leaflets they say to the households they quote. they simply dump the excess leaflets.
best for me were royal mail, and a larger local distributor who charged about £50 per thousand, but were very good and reliable. if you consider the cost of leaflets wasted, as well as the increased response rate you get from them actually getting to the households, more expensive is generally more cost effective.