I honestly would have no idea for an offer...I have found a trunk carpet for a 97-01 prelude for $30 online (handa-accessories.com), but i dont know if that that one would fit, and that the Antenna mast goes for $20.99 on ebay, and im sure higher prices' elsewhere...

the carpet since much smaller and not as presice, i would say like $30 if in great condition and $20 if not so good...and the mast like $10-$15, cause it isn't new and coming off a car already used. I live in NY so im sure shipping would be up there, especially for the carpet unfortunately...