Boy's bike wanted (LS6)

We're on the lookout for a new-to-us big-kids bike (i.e. not quite adult
size, to fit a 10-11yr old or thereabouts. One chart I saw(1) suggests
~24" wheel diameter)

If you have one recently replaced or outgrown, we'd gladly give you a
fair price in proper money, jam or other currency for it.

Thanks,
/Sam

1. http://www.wiggle.co.uk/h/option/bikesiz...