I have just cut mine. It cost nothing, I reckon that I spend less than 50p a year on hairstyling.
At least twentyfive years ago I bought electric clippers to cut DH's hair. He had lovely thick wavy hair (but it thinned out considerably as time went on!) I liked it to be long enough for the waves to show, but barbers seemed to favour the "short back and sides".
I used to get my own done in a succession of salons. The first cut was always great, but subsequent ones were never as good, and they didn't listen when I told them what I wanted. I seemed to be always chopping bits off here and there to get it to look right.
Then I discovered that the longest setting on the clippers, number 14 or 40mm, was good for cutting my own, and I have used it every couple of weeks ever since. I trim the front edge with comb and scissors, then use the clippers to get the sides, crown and back to an even length. When washed it just needs towelling dry and pushing into shape.