Whil'st i would agree about lowering prces is a bad thing to do, sometimes if you havelittle work to do, better to work for a reduced rate than to not pay the bills.
Cutting one's nose off to spite ones face. This customer can also lead to further work, either from them or from their recommendations. Remember, some businesses offer their first job at a reduced rate to attract people to them in the first place.
If you charge £40 a lounge, an extra fiver wont break the bank, and added up per year is a lot assuming 3 or jobs a day. When i first become self employed i was given a business mentor for a year to advise me. One thing he told me was to get £20 an hour was acceptable, but to work for as low as £10 if need be.
Now i am getting between £40 - £60 per hour with my tm, but occasionally the job takes longer than i thought, so i end up with £30 an hour. Still a reasonable ammount. Look in the jobs pages out there. If you can get the rate, good, if not weigh it up first.
Dave