What's a reasonable price for a set of parted out (real) GT4 spoil Options

[delusionz]

Hey, I really want these spoiler blocks, I couldn't meet his reserve and he offered the pair for NZD$400 which I wasn't prepared to pay.

Someone asked a question on his auction offering $100 he blew off as a joke, which is a bit less than what I think they're worth but nowhere near $400 especially since enthusiasts on boards like these mass produce these in fibre glass right?

I'm sure these will come up at some stage or another from someone wrecking a GT4 but it could be any time between now and infinity and I do want them at some stage during the life of the car under my ownership.

On a side note Rusty bought his full set of GT4 calipers and discs for $500 so compare that to the $400 that this guy is wanting for his riser blocks. A full GT4 is worth about $9000 in good condition to add a little more perspective and 3s-gte gen3 engine is roughly $3000.

So how does this weigh up to getting in on a group buy and paying for international postage to New Zealand?