Sure got quiet
To anyone else reading this and thinking about these VERY common SCAMS...his 'co-worker (coughyeahrightcough)' most likely flushed a chunk of money away to a scam site. They have been around for years, selling many relatively expensive electronics item for WAY below going rate. Wow, imagine that, the items never appear!
Common sense protects most people from these things. For everyone else, the 'ol adage 'if it seems too good to be true, it probably is' holds true.
If this guy ever comes back - I'd paypal him $5 for a picture of the 20D on top of the invoice