After several years of occasional bidding, I finally managed to win an eBay auction for a rare complete copy of the Lemmings cartridge for my old Atari Lynx handheld console. The cartridge itself pops up from time to time, but it's much less common to find one still in its box, much less complete with manual and in excellent condition.
When the game arrived from England, I realised that I would be unable to play it (or any other in my collection), as my AC adapter is 110V only (bought whilst in the USA). Batteries aren't a realistic option, as the Lynx positively devours the things, so I would need a new adapter for use in Europe.
Even though the Lynx is now about 16 years old, it's still very easy to pick up an original Atari 110V US power supply (complete with box). The 3 pronged 240V UK adapter is a little harder to come by, with the 2 pronged 220V continental European model by far the hardest of the three to find. Consequently, it's a little pricier to purchase, but thanks to the power of Google, I did manage to locate one. It arrived a few days ago, so I'm back in Lynx-playing business.