another worry is that the join at the top between the seat post and lug has a gap... that would be pretty shoddy workmanship for someone qualified to build in 753.[/img]
i can remember peugeot's reynolds frames being shoddy at their best back in the late 80s, i'm afraid. we used to sell the 531 PRO version and they really were rough to say the least. nothing of any quality was used - the lugs, bb, fork crown AND the chrome were all fairly ghastly. saying that, they were around HALF the price of a Raleigh SBDU frame so "you gets whats you pay for".
i can't say that i recognise the coloured frame in your ebay link as being the kind of peugeot i remember from back then. they were all a dark graphite colour from peugeot - perhaps your's was a later frame? also, i doubt if the ebay seller would try and con you - he's got over 600 positive feedback - i don't think he'd risk ruining that by handing on a fake frame.
what kind of threads are in the bottom bracket shell and on the fork column?
TvT, Oakleys & painkillers . ..
..what else could you possibly need?!!