Full List:
@BankOfBitcoin $100
@BitcoinCopper $100
@BitcoinDirect $100
@BitcoinFinance $100
@BitcoinIntl $100
@BitcoinNote $100 <-- Buy either, get both -- @BitcoinNote, @BitcoinNotes
@BitcoinNotes $100
@BitcoinPawn $100 <-- Buy either, get both -- @BitcoinPawn, @BitcoinPawnShop
@BitcoinPawnShop $100
@BitcoinPurse $100
@BitcoinTech $100
@BitcoinTreasury $100
@BitcoinWork $100
@BTCCollector $100
@BTCNote $100 <-- Buy either, get both -- @BTCNote, @BTCNotes
@BTCNotes $100
@BitcoinSilver $500 <-- For a fork of @BitcoinGold, maybe using Scrypt?
@ClubAlpaca $1,000 <-- Great set of followers for anything e-commerce related.
@CryptoGold $500
@EarnBitcoin $400 <-- Buy this one, get all three @EarnBitcoin, @EarnBitcoins, @EarnBTC
@EarnBitcoins $250
@EarnBTC $250
@GPUMine $150
@GPUMiner $300 <-- Buy this one, get all three @GPUMine, @GPUMiner, @GPUMining
@GPUMining $100
@MineBitcoin $250 <- Buy this one, get both @MineBitcoin, @MiningBitcoin
@MiningBitcoin $150
@WinBitcoin $500
Feel free to make an offer on any of these.
Why this is valuable? ... if you have an account with a lot of followers but a crappy name (very common), you take one of these accounts with a great name (e.g., @EarnBitcoin) and move it aside (i.e., rename it), and then "move" your account that has existing followers to the name you just bought. And voila, ... you then have both a great name, and a great following.
Great names are nearly all taken already (since there is zero cost to register a Twitter account). These were mostly registered in the early years (i.e.., 2010, and 2011). So buying an existing name is a way to rebrand an existing account with a good name that will make it easier to grow going forward.
The value comes from the account name -- it is rare to find a decent Bitcoin-related Twitter account name that hasn't already been taken. For instance, if you have a faucet or something that pays out Bitcoin for some task, @EarnBitcoin is a great Twitter account name.
So the account is for sale, but the value is in the hard-to-get username.
Interested in an account but don't feel the asking price is right? Make an offer!