Yeah.
We used to keep it up to date each time one or more new machines went into production use or got taken out of production use at my former office. Just put the date it went into service, serial number, type, department, location and so on in a DB this way you can always keep track of the machines.

Afaik there is no way you can actually see when a machine is purchased, at least not using a script because this date is not to be found in the machines hard or software but in the invoices folder at your finance department.
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Mart

- Chuck Norris once sold ebay to ebay on ebay.