Depth Finders Newbie advise

[tackle2004]

More help needed as new to this boating thing.

Can some body advise me. I would like some kind of depth finder for my boat but do not wat to spend a fortune.

I have seen this one
http://landandwaterleisure.co.uk/cat...74c56e475b1f7e

Nasa Target 2 Depth £79.99

Only need it for my 14ft fletcher whilst I will be out skiing will this be ok for me????

Also can somebody advise on what sort of cost a boatyard should be asking to fit it???

Or would this better for the job

http://landandwaterleisure.co.uk/cat...74c56e475b1f7e

Eagle cuda 128 £76.95

[Whodareswinstoo]

How about...
http://cgi.ebay.co.uk/ws/eBayISAPI.d...151265265&rd=1

Dunno if they are any good but seem cheap to me.

I.e Don't need to have it fitted.

[Matt]

I've got a brand new garmin fishfinder 80 on ebay at the mo, currently at 50 quid. I reckon they're pretty good for the money, only selling it cos I've had a change of plan, similar in price and performance to the eagle 128