Why would they be fake? 'Value' is perceived differently by different people. I don't think sedo would bother faking bids and sales, what's the point when they seem to be doing enough business anyway? Dismissing these as 'fake' just might make it easier for some people to accept, like "it's such a high price, it can't be real, therefore it's a fake bid/sale". mind at ease now.
I would say that these types of sales happen on a regular basis; seeing what most people would think are low value domains going for higher prices.
like:
Fozz.com $10,000 (sure it's 4 letter pronouncable, but who here would have appraised it that high?)
XSXX.com ($9,200) oops, three 'bad' letters
Ewix.com $4,000 two 'bad' letters
FYCO.com $4,600
q955.com $2,202
Qlip.com $4,088
opko.com 6,500
imrd.com $500
and these are just a few I found sold in the past week. without the sales figures beside them this domain list looks like a 'domains for sale' post from hell.