Generally the only things worth salvaging for other projects are the heatsinks and through-hole polymer caps, which may be worth €5 to you. I have occasionally had a need for a power mosfet and found a matching one in the junk pile, much quicker than ordering from China.
Of course, may get lucky and find the only issue is a CMOS clr jumper or something! ~85% of the US$5 as-is motherboards I've bought work (or at least with only something minor that doesn't like the NIC) and yet all of my stuff like routers and switches are now filled with polymer caps in place of electrolytics, LoL. €5 = $5 now too.