Worth splitting if he’s looking to maximise revenue…
The frame could manage £3-400 on it’s own perhaps, it looks to be in good condition and having Orange on the downtube won’t hurt it’s re-sale value…
Not sure the forks will command such a huge sum though, as they are:
A) Manitous, and
B) 1.5″ steerer
Both of which people can be a bit averse to these days…
He might be able to bump the frames value if he flogs it as a Frame/Fork/Headset/Stem lot instead maybe?
Parts all look good, He’ll most likely make more flogging the brakes as a set and the wheels as a pair on their own, than if they’re still on a complete bike…
Most of the other kit looks reasonably good, perhaps a bit “Freeridey” – 22/32/bash ISIS double? – Flog the chainset with the BB included I reckon, but otherwise tell him to pop most of the drivetrain up as separate items ie. F/R mechs on their own, shifters as a pair, cassette (old used cassette might not sell), pedals, etc…
It will all sell to someone, tell him to have a look at the Southerndownhill classifieds as well as fleabay if he wants a reasonable guide to what people might pay for items…
More faff and postage spliting but generally more money to be made…
Edit:
It’s probably also worth making the point, if he does flog the frame on it’s own, that its 1.5 head tube can take the slackest anglesets going, that could well help its appeal to the DH kiddies… Just a thought