I've heard good things about the AC 7 since it has a high price-performance ratio. Another relatively inexpensive one to look into is the Xigmatek 1283. If I were paying $50 though, I would rather find a used TRUE 120 on eBay and ask if the seller will ship intl. I got my TRUE 120 w/o a fan for about $50 shipped to Honolulu. I'm sure you could find one cheaper if you're patient enough though.
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※ | SinglePower MPX3 | ※ |Sennheiser HD650 | ※ |Audio Technica ES7 | ※
※ |Theta Cobalt 307 | ※ |Denon PMA-2000 IVR | ※ |B&W DM603 S2 | ※ |tSc T250 | ※
※ |NAD C521 BEE | ※ |NAD 352 | ※ |Klipsch RF82 | ※
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