A couple of weeks ago I drove from eastern Wisconsin to central Minnesota and stopped at every Goodwill on the way. Like the posters above, I found a LOT of variation in pricing for exactly the same thing, and a huge difference in what they're selling. One Goodwill had almost half the store filled with new things at new prices: ziplock bags, cleaning supplies, brooms, etc. Much cheaper at WalMart. One had paperback books marked at 99 cents and another had the same books marked at $4.99. Found only one "beater" sewing machine and no fabrics anywhere.
Congratulations to the original poster who found the fabulous buys - we're all envious!