You can certainly find some awesome things at thrift stores! That was such a great deal, and as long as the disks are all in good condition the slightly banged up box isn't a big deal at all.
This NGE collection really cool, Im glad u have it now ^^ This big hat on the Mio's figure reminds me of Caitlyn x) Dont big of k-on fun, but Mio looks really adorable, so I think I buy her someday x)