If you get stuck, Per Gunnar (PG on this forum) did a great job of resurrecting my dead Apollo 1240 and upgraded it to a 1260. Strange thing was that he found 33 mhz 68040 worked with a 40 mhz (NOT 66 mhz) crystal, but I decided to get an 68060 fitted by him, although this also runs at 40 mhz, not 50 mhz. Its still faster than a 40 mhz '040 and cooler so I'm happy.
BTW the French dude that wanted 1. 50 Euro to return it and 2. recommended you trash it sounds like he wanted it for himself! So I reckon its fixable