I go to Doc Cranston at Harpenden every six months for my Class 1, I'm on 6 monthly ECG's due to my advancing years (53) and he charges
220 for the lot. I don't begrudge it because over the years I've seen how much crap the AME's put up with when they're going on mandatory courses at their own expense and now having to put up with the EASA audit system.
I'd hate to change AME. I have a lot of trust in mine, and over the years he has built up a good record and picture of me should I ever have a problem.