Anything from £200 with a ladder and pro gutter tools to thousands with a top of the range vac.
Bare in mind to offer a full and complete gutter clearing service a ladder is a necessity even if you use a vac. No matter how good your vac is there's always going to be jobs with deeply blocked downpipes or maybe gutter guards or hedgehog brushes to be removed that require a ladder.
I own 2 gutter vacs and to be honest its just as quick most of the time with a ladder and a 5m harris pole with pro gutter tools.
A lot go for skyvac but personally i think their way overpriced.
This guy was on the stand next to me at the expo show and he was selling good reasonably priced equipment.
Ladders are fine if used correctly......I didn't say I actually do them from the ladder....find when it's damp a residue of mud tends to stick to the bottom so I'll vac them...check from the ladder they are clear then brush any residue into piles and vac them.....also sometimes the roof liner lies too far over the gutter and muck gets trapped......I price these jobs well so I don't need to rush and can do a good job safely.....also I don't take on jobs where I can't use a ladder safely with the stand off.