How much does a watch winder cost?

"Prices for a Watch Winder based on Retail or List Price: $50 per winder head - 3 months of troublesome performance; $100 per winder head - 6 months of troublesome performance; $200 per winder head - up to 12 months of trouble free performance; $300 per winder head - up to 48 months of trouble free performance; $500 per winder head - up to 60 months of trouble free performance, at which point a simple repair may be needed; $800 per winder head - up to 96 months of trouble free performance with occassional maintenance (simple belt replacement etc)."