My parents industrial Vitamix 3600 received as a wedding gift in the mid 70's, still making smoothies and grinding wheat into flour without complaint : r/BuyItForLife
Vintage Vitamix 3600 Plus Blender Mixer Stainless Steel Pitcher Action Dome Top for sale online | eBay
Vitamix 3600 Plus Blender Chopper Extra Heavy Duty - Etsy
Vita-Mix 3600 Plus Stainless Steel Blender Model 479043A Action Dome - Works | eBay