I have an opportunity to buy a used Woodmaster 3840 drum sander (5hp Leeson motor) that appears to be in good condition. It does not have a belt that walks the wood through the sander, rather it has pinch rollers that force the wood through as it slides on a laminate surface. I am guessing that this is the primary difference between this model and the newer 3875 that does have the belt. My question is, for $850 is this a good deal for the older technology or should I wait and get the belt drive model for MUCH more than the $850? Does anyone have any experience with the older Woodmasters that have the pinch rollers? Also, I'm being told it's 12 +/- years old. Does anyone know when Woodmaster came out with the belt drive model? I'm looking for this to use in my home shop. Thanks for any advice!