Bison 81115 S vs Bison 81315B S: 5-year value retention (76% vs 76%), resale value, and cost of ownership head-to-head. Bison 81115 S holds its value better.
On five-year value retention the Bison 81115 S comes out ahead, holding about 76% of its value versus 76% for the Bison 81315B S. Over the first five years the Bison 81115 S loses roughly $20,433 while the Bison 81315B S loses about $21,473 — a gap near $1,040.
First-year drop is the biggest factor: the Bison 81115 S sheds about 16% in year one versus 16% for the Bison 81315B S. If you buy used, the steeper early drop is what the original owner absorbs.
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