Looks like a Boxer but can't make out the number after the 'Boxer', I think they range from 15 -30 - 65 watt with commensurate speaker size. If it's a 65, (IIRC with a 15" speaker), they're not bad for practise, low level rehearsals, maybe even small pub gigs, I'd say about £65 - £75. If it's a 30 W / 12" - OK for practise with a decent TE sound, £40ish, the 15 W / 8", £20ish, OK for a beginner.
The guitar as already said would probably be £50 - £75 if it's good.
Together I'd say £150 max, if the 65 W, that's not really 'mates rates' if you know what I mean IMHO
Cheerz, John