Dan,
At the end of the day you have to test leaflets yourself.
For example 1 in a thousand brings in average sale of £120
Printing costs £10 distribution through leaflet distributor £25
Total cost £35
Gross Profit £85 time ten =£850 easy money
On the other hand average sale £60 same costs £25 gross profit.
time 10 = £250 gross profit
Lot of risk and work for little reward
Unless you are good at referals
so there is always hope
Thats the secret keep smiling
And quitters never win