When I got my first harvest I had 2 buckets of honey, about 65 * 400g jars. I use 400g jars as I found a cheap place to get them.
I felt overwhelmed with all that honey and had no idea how I would ever sell it. I started with my friends, family and co-workers. Then they all started introducing me to more of their friends. The stock pile quickly started dwindling.
I found dropping the fact that you keep bees into every conversation possible helps too. If people know you keep bees, they will ask for honey if they want it. I ended up selling to my dentist via this approach.
With a bit of word of mouth you will soon find some honey regular customers.
By my second harvest I already had some orders to fill. Then my wife started selling online and demand could never be satisfied from that moment on-wards. I had 4 hives so it was not a big operation, but all honey would sell out with in a month of harvest.
A large part of the online demand was for chunk honey, a 400g jar with a chunk in it sold for £12+p&p, there was less competition for chunk so it sold well at a good price.
But good luck with your 1st harvest. When you see your first jar of home made honey, its like having a gold bar in you hand, then you will realize how easy it will be to sell.