Having been at a few high-end IRL auctions last year (eg, Bonham's), I can testify that - as the article points out - real-time online bidding has become a very big part of the high-end auction business.
At one event, Bonham's had 5-6 people working the phones, and one busy person vocalizing the action on the net and, oh yeah, that guy with the hammer chatting-up the bidders on the floor.
The question here not whether, but
how an auction house should implement real-time online bidding.
DIY gives you commercial security - no other company gets to see your customer base - and exclusive control over your investment, features, etc.
But
ebay brings proven infrastructure, which reduces what Management Types call Program Risk. This is pretty important.
I would look to more big players in the auction trade to link up with more 3rd Party eCommerce providers.
Cheers,
/s/ ikeyPikey