The other point is it sustainable?
That's a good question.
Also once you have put them down, can you ever put them back up ?
If it was me and I'd been tempted to see you, then saw you had lowered your prices it maybe an incentive to come and see you,
if I wasn't blown away, but thought yeah not bad for £80 chances are I'd come back at somepoint.
If you put your prices up, to whatever they were (I don't know) I wouldn't come back to you.
Hope that gives you an insight to 'this' punters way of thinking.
As long as your service is the best you can possibly give, £10 or £20 isn't gonna make a difference.... (to me anyway)