Cobalt R7 vs Sea Ray SLX 310: 5-year value retention (58% vs 58%), resale value, and cost of ownership head-to-head. Sea Ray SLX 310 holds its value better.
On five-year value retention the Sea Ray SLX 310 comes out ahead, holding about 58% of its value versus 58% for the Cobalt R7. Over the first five years the Sea Ray SLX 310 loses roughly $165,795 while the Cobalt R7 loses about $65,033 — a gap near $-100762.
First-year drop is the biggest factor: the Sea Ray SLX 310 sheds about 32% in year one versus 8% for the Cobalt R7. If you buy used, the steeper early drop is what the original owner absorbs.
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