Gazim,
I bought my Dolphin Gauges out of an ad in Streetrodder magazine directly from Dolphin. Don't know if that was the best price or not, but I did it anyway. Couldn't get them to work, so I sent them back. They e-mailed me shortly and said they tested them and they were bad and sent me a new set that worked. One thing about them to remember: use all the sending units that come with them. Tried them using the temp and gas sending units I already had in and they didn't work. Put in the sending units Dolphin supplied and they worked fine.