Sorry, When i see w3, i think of an educational site now-a-days.
I dont think this will go for any price above the Reg fee.
But endusers always have variying minds, and some might even bid for mid XXX for this one , since i see several crazy hyphenated domains go for mid xxx.
Well, with auction sites becoming ever more popular these days, W3BIDS could be used as an "informative" site to inform people where, how, when, what, why to bid.
This was one I looked at awhile agowith the intention of building a niche auction site.. never did reg the name but as everyone knows, I'm partial to the W3 prefix.. I'd park it a bit, then maybe develop it as a domain auction site (w3=www or web)... mid to high xx, primarily because it's short and easy to remember.