very interesting... i'm looking at this as well!
FYI - i bought a 165mm SR pista crank just like this one (except the length as noted) 8 months ago and it went for $275. i've since realized i'd be happier with the 170mm so i'm thinking of this crank as well, and then re-selling the 165mm crank. of course, this current offering may go for much less, but i've watched these things closely over the last year and NOS SR pista cranks always go for around $250. i don't know if that's what they're truly worth, but it's what the market will bear.
if i get this one and you're interested in the 165mm, we could talk a deal - but it would be around $275 since that's what i paid.