I've had a lot of dental work done in Russia and my wife has had 3 implants. Very happy with the results but this is at the top end of the price scale. Still cheaper than the uk though. What I certainly wouldn't do is go to the places which offer implants at 200 euros a pop. Got root canal work done here for 70 quid and it was rubbish.
I've got an implant a few years ago.......... .....cheapest I could get it done was £1800 at a dentist at the back of Peel Square near multi-story car park in Barnsley. Other places throughout Yorkshire were quoting over £2200 for it. If I remember right - they put a screw into your jaw and then let it heal around it before fitting the tooth. So I can't see how you can have this done abroard because it took several visits to the dentist over a few weeks to get it sorted out.
Re: I've got an implant a few years ago.......... That's right Nudge, and a point I was about to make. You have to wait 6 months after they put the post in before fitting the actual tooth, and that's if it holds and doesn't drop out.