I bought one in Canada about five years ago while I was there, ’bout $120 CDN at the time. It works well.
I used to do them freehand, but now I can’t see the ends of the drills, but the Drill Doctor does a good job, I have no complaints.
Conversions would be about $100 US or £63 GB. But there are different models at different prices.
Don’t forget it’ll be 120v, so you’ll need a converter, so maybe get a small inverter whilst you’re at it, they’re pretty cheap over there.
Ian