Apple has refurnished 1st generation iPod Shuffle 1GB for $39 (down $10 from being $49). Shipping is $4, or free on $50+ orders. If you are buying close to $50 worth, you can get a $1.99 filler (search for "Airport Enabler") to get free shipping. Thanks stevenjchang.

They also have

• iPod Shuffle 1GB (current generation) $49 + $4 S/H or $1.99 filler
• iPod Nano (previous generation) 2GB: $99 or 4GB $129 Shipped
• iPod Nano (current generation) 2GB: $119 or 4GB $169 or 8GB $209 Shipped
• iPod Video (previous generation) 30GB $179 or 60GB $229 Shipped
• iPod Video (current generation) 30GB $209 or 80GB $299 Shipped