I have used the Tracker IV a little, but know nothing on the Treasure hunter 3030 and wonder if this is one of those detectors made in China. The Tracker IV I know can be got for less than $100 and it seems to work OK, but not my favorite for a beginners detector. I recomend spending a little more and look at the Tesoro Compadre as we know what this detector can do and so easy to use.I got my 6 year old Grandson one and he just loves it,but has got some nice finds with it. Another possibility I see is the new Garrett Ace 150 that I see some are selling for a little more than a Tracker IV, this one has a ID meter, 3 tones target ID and also a depth meter. I have one in my shop and it seems to be a very impressive detector with features found in detector costing over twice as much. They have a Christmas special too right now too so you get a treasure book, a nice set of headphones and a very nice carring bag too that is free with the purchase of the Garrett Ace 150. I will say it looks like Garrett has made a winner here and these are not to be confused with the Treasure Ace 100. 200 or the 300 which are being discontinuded, the Ace 150 and the 250 are brand new models just released.
Rick