first you need to open up your 2500 and find out what pad sheet you have,
sensitronics or
interlink. if you happen to have interlink then those are only $60 on mpcstuff.
http://www.mpcstuff.com/pad-sensors-wit ... r-mpc.htmli believe the interlink pad sheets are on older 2500 models as they were the same pad sheets from the 2000xl and 4000.. the interlinks are a bit more durable i believe. the sensitonics have had the most reported problems of 2500 users.. the immediate difference in the pad sheets is the size of the ribbon cable.. so they are not interchangeable..
there is also a quick fix you can try, where you cut the sensor sheet on the sensitronics.. check the search, its been discussed here before...
if you feel 100% that your pads are dead and you have nothing to lose try this fix on dead pads..
selling mint X SE on ebay.