"They can also be upgraded with current components, if you cannot find old replacement parts, even though this can get spendy."

markm, your Peugeot is likely French threaded in the bottom bracket and headset (BB may be swiss, according to John E, but I have three bikes of like vintage, judging by the decals, and they're all French). This makes replacing those parts with current parts tricky at best, though there are some fixes for most any problem. You can shift over to a more current crank, for example; but you'll likely either need to replace the BB cups with thicker walled Japanese made French threaded cups or use an Italian spindle.

Keep the parts lubed and maintained, tho, and they will last. I've got a couple of similar Peugeots I use as all purpose beaters, and they are tanks.