Sylvan 8520 Mirage Cruise N Fish vs Sylvan Mirage 820 Party Fish 4 0: 5-year value retention (64% vs 64%), resale value, and cost of ownership head-to-head. Sylvan 8520 Mirage Cruise N Fish holds its value better.
On five-year value retention the Sylvan 8520 Mirage Cruise N Fish comes out ahead, holding about 64% of its value versus 64% for the Sylvan Mirage 820 Party Fish 4 0. Over the first five years the Sylvan 8520 Mirage Cruise N Fish loses roughly $8,668 while the Sylvan Mirage 820 Party Fish 4 0 loses about $10,625 — a gap near $1,957.
First-year drop is the biggest factor: the Sylvan 8520 Mirage Cruise N Fish sheds about 7% in year one versus 36% for the Sylvan Mirage 820 Party Fish 4 0. If you buy used, the steeper early drop is what the original owner absorbs.
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