Why did you not consider the Cryptsy XRP Markets? Most of the coins in it have prices that dropped too low to trade in a litecoin market although some of them once had bitcoin markets. Buying them is an extreme long shot gamble but could pay off with an extreme dose of luck.
Do you consider them too risky to invest in, like million to one shots?
There is the only one coin in the Cryptsy XRP market which price has dropped so low that it is impossible to trade it for LTC - CENT. All I remember about that coin is that around two years ago CENT faced hyperinflation due to an error in its code. Another reason is that many investors avoid XRP, not decentralised, not mineable, not fair in their opinion. LTC is classic.