Goodwill has an online site and you can bid, just like on EBay.
https://www.shopgoodwill.com/
One caveat, make extra sure that if you buy a machine online, the seller knows how to properly pack a sewing machine for shipment. Many people think that since these old machines appear indestructible, nothing can hurt them. However, they most certainly are fragile and need some extra TLC. The is a, "how to pack a sewing machine," article floating around on EBay and also in the Vintage Sewing Machines thread. I'll see if I can find it for you and post it later.