I will only separate the wheels if they add up to $100 (or another offer in the ballpark). In other words, if four people each want to buy one wheel, I will sell them for $25 each. If two people want one wheel, I would offer them each two wheels for $50. If I were to sell one wheel to you for $25, it would make the other 3 valueless unless I could find others who wanted one wheel.
That said, if you want to buy the set and have room in your garage, you can keep one wheel for yourself and try to sell the other 3 one at a time.
I will snap a few pics of the sub/amp and post them. The box is a pretty nice DIY ported box--shaped like a trapezoid, painted gunmetal with duplicolor paint. Sub is in great shape. The amp has a little rust on it, so that's why I only want $75 for the setup. It was thumping hard when I took it out of my hatch, though, and has been stored indoors in my closet since then. Both the sub and amp should be good to go once they're wired up.
All you need is a wiring kit and you have solid bass for less than $100!
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Car is SOLD. Worst decision ever.