I have had one of these for the last 18 months purchased it from amazon and is capable of giving good readings but can be a little slow if battery starts to go down a bit but worth the money compared to some, obviously not as good as the swordsky ones but at a 1/6 of the price i can live with it.
http://www.amazon.co.uk/Longridge-GADFL1-Laser-Distance-Finder/dp/B000UTOHBE/ref=sr_1_2?ie=UTF8&qid=1304010633&sr=8-2
Best
William