they look like a watanabe style wheel in stock offset, they are only worth what someone will pay for them. Look through some of the old for sale threads searching for watanabe wheels and you'll see what they usually go for.
Looks like watanabe replica Ben, I had a set of these back in the days of the starlet, true watanabe have this distinctive logo around the wheel nut area, I might have a photo somewhere....
still nice and light though, just not the watanabe tag.
i have a set like that too. got them for $200 on ebay. i beleive mine are made by bridgestone in japan?? they are nice and light and seem well made. mine are black but the paint is very faded so i will repaint them before i put them on the car. you should be able to find a centre cap to cover that big nut in the middle. i reckon you should visit your local mag wheel shop i reckon they'd be able to help you out.