Hi mate, if I still have them in 8 weeks then consider them yours!
I actually bought them here in Perth s/H for $3300 with tyres. I believe they came over here on a silver GT-R from Sydney originally.
I'm not sure how much they weigh as I haven't weighed them with the tyre off. I can only tell you that I also have a set of Rays CE28's in 18x9.5"+22 and they don't 'feel' any different to pick up.. of course that doesn't mean a whole lot because tyres can weigh differently and the difference between a 'light' rim and an 'average rim' is sometimes only 1-2 kilos.
All I can say is that they are probably at the lighter end of the scale for sure.
I think to buy new Work Meisters in this size, you'd be looking at $1200 or $1300 per rim these days? So I think these are going for a very fair price.