They are quite cheap to get in Thailand. But in UK some are free. It all depends on what you've had previously, if they need updating and if you want any added protection. Only you and your Dr can decide that. I'm having my HepA because it's out of date. But that's because someone's recently returned to UK infected and extremely sick. I've decided to get mine updated.
those are cheap prices. I've just gone through my vaccination record to see what has lapsed and need boosters. HepA required an argument with my GP clinic to get him to agree to me getting it.
deliberately using the wrong term for visa exempt just misleads people and can or could cause a problem for them. That may amuse you, but it's a bit silly.