Where's 4, 5 and 6 i hear you all cry, well i'm not giving you the whole thing so you might be tempted to buy it when i finish it and start selling it (btw anyone know any good UK based, comic printers?)
[link] <--- ka-blam are in America but printing with them is cheaper than printing in the UK if you want traditional standard comic sized paper. I know of some people who have used this printer, and they recommend it.
other than that, if you go to a normal printer and print A4/A5 booklets then it should be a reasonable price. (as long as the size isn't awkward)
I'm new to all this too, cause I'm trying to print a comic with some friends for BICS... but I hope this helps you.
your comics are great, it would be great to be able to buy some.