Hello DG,
They're 130 I believe
Freewheel fixing not cassette
Indeed they are true and nicely built with even tension across all spokes
They're Conti GP3000 tyres front looks to be in great nick, the rear is, technically 'shagged' on the dependability side of things as there are several splits in it.
Postage to NI would be about £15 I should imagine with PF.
Cheers DG,
Denzil