yep it makes sense, but oftentimes i'll just hit last post or newest posts and i would miss that edited first post. Sometimes i'll start at the top b/c it's new to me or just to remind myself what the post was about, but not always.
so i do both when it's me. edit the title so that SOLD is in there, edit the post so that SOLD is next to the price (and DON'T take down the price d*amnit, i hate that

), but i also put a last post that says 'sold' or 'traded', so the 'go to last post' people are also covered. if you saw SOLD in the title, you'd skip it anyway, right?
of course, a good salesman wants you looking at the knife, wanting it, THEN seeing sold at the very end after you've already decided you want it. then you jump on his next one early, or remember his name, or even contact him for your own custom. that's just smart salesmanship.
i'm with samael. drink more. that's my answer to everything, though, so i might be biased. or drunk.