I pay my window cleaner £5 for a monthly visit - double if he is doing inside aswell as outside obviously. He travels 4 miles but does mine and the neighbour I recommended him to on his way to other contracts so no additional mileage incurred.
I couldn't afford to pay the rates some people charge for things, because I don't have any income to speak of now - there are lots of folk claiming what they're worth but they can't get it if I don't have it
A guy with a chainsaw charged me £50 for a day felling and logging, with me doing the dragging and lopping of smaller stuff. The next guy charged me £100 for the tree or £200 for one up by a building because of extra risk. This year my neighbour did it and took 2/3 of the wood as payment, I have less to keep warm but at least the tree is down and I have something to burn without going into debt paying someone what they want to charge me.
Most of what I "pay" for now is on a similar barter system, I can't get enough people to pay me what my training says I'm worth (psychotherapy rate is £45/hour, counselling £35/hour, massage and/or reiki £25-30 for 45 mins just as examples) but it is at least a useful currency if someone needs a massage or wants some eggs or fruit or a veg patch to work themselves or a trailer of manure or in one case I swap free service to my stallion for backing/schooling a young pony, with the grazing swapped like for like til the mare is ready to go home or quite often I take her longer than I get, just out of good will and the fact that when visiting said mare the owner is usually willing to help with a 2 handed job I just can't manage alone.
So in answer to your question, whatever I can afford or offer in lieu of payment.. and if that ain't enough then sadly it won't get done.