You are way too early in the game, I would have waited to see what happens instead of bidding too early. ebay 7 day is just a exposure time, most of the serious bidding takes place during last 24 hours. By looking at how much it is at right now ($76) I can guarantee that these rims going for over $150 in the end. But otherwise, I hope you get really lucky and you just scare any "checker uppers (who just feel the bid by $1 or so)" with your $100 bid.
Let's wait and see.
Just noticed he doesn't ship.. that limits the bidders, so GOOD LUCK. If only cragars were compatible with TPMS.... sigh