Hold on now, I gotta disagree. That PC1832 is a tank if the rest of the system is good. I've kept a bunch of those old girls running for years past their prime. The main board going is one thing, but the chips and sensors are still out there if you look hard enough. It's often way cheaper to find a used working board online than doing a full swap with new keypads and everything. For a lot of folks, keeping the old system going makes more sense than a big upgrade.