I bring my MP3 player on every flight. It means the music I want to listen to is available, and it's small and portable making it easy to transport on board. And they have become a very affordable gift option...
1. Nextar MA933A 1GB Red MP3 Player
May not have much storage, but cheap - spotted this as low as $15.
2. Apple iPod shuffle 2nd Generation 1GB MP3 Player - Blue
This is an entry level iPod with a price tag under $50.3. Mach Speed TRIO Onyx 4GB MP3 Player
This was one of the least expensive 4GB options I could find online starting at about $304. Creative Zen Stone Plus 2GB MP3 Player - Red
The Zen Micro comes in lots of colors. This one is red and is under $50 online.5. SanDisk Sansa c150 2GB MP3 Player - Black
This MP3 player has 2GB and starts at about $20, not a lot of storage - but cheap.6. Pioneer inno2BK 1GB MP3 Player/XM Satellite Tuner - $75+
Mp3 player and XM satellite radio capabilities in the one device - it did go over $50, but was one of the least expensive options for also having XM.7. Sony 2GB A810 Walkman Video MP3 Player - Blue
This entry level Sony is stylish and about $55.