I personally do NOT use the 68040 processor. They tend to over-heat and are not reliable enough for me. The 68030, 68050, and 68060 are better processors, the 68030 being the highest quality and best built of all the 68000 Series. The 68010, 68020, and the military-spec 68000 are also high quality, very well made processors. Sorry, but the 68040 is the worst of all the 68000 Series processors, so I do not need the ones you are selling. I have a 68040 board that I want to trade for the Commodore 68020 or 030 board.
Theres nothing wrong with the 040 there a lot better than an 030 mine on my blizzard ppc has never overheated even after 8 to 10 hours use . :-)
Still on 50 pence thats a bargain at the moment. I would have put a reserve on them not long ago these would cost a fortune. :-) :-) :-)