I should have waited for the auction! Although, if i were in the mix for bidding I'm sure the price would have gone up a bit. Congrats on the three quick sales!
Let me know if you decide to part with any more Casascius coins.
I still think the .75 that you paid was a good deal for a brass half, especially considering its condition. There is a high supply of brass coins from 2013, so their value is somewhat capped but that doesn't change the fact that they are nice coins.
I'll send you a PM about other coins I might be willing to part with.