Re:
Got a grey D521, but it's built up as a wheel at the moment, with 32 DT Swiss double butted spokes on a Deore LX (M563) hub, with quick release. The hub is a bit notchy but I'm pretty sure it just needs stripping and greasing.
The rim is straight and round and in good condition. Just worn in, with plenty of life.
£30 posted for the wheel or £20 for the rim.
Rich