You can get a Gen 1 Lowrance HDS 5 on eBay for around $200 without the transducer. The transducer and wiring harness can be had for just over $100. For around $300 it is an amazing unit. Color, GPS, and dual frequency transducer. Lowrance replaced one of my older units with a one of the HDS 5s. The GPS and being able to follow your track and save way points is extremely helpful.