Looks like it's in good condition. $US405 and counting.
Re: Integer BASIC. On my Apple II+, my DOS 3.3 copy loads Integer BASIC into spare memory if it discovers a 16K "language" (i.e. memory) card is present. Just in case I want to use that version of BASIC for some reason I guess? I'm not sure if this was a standard function in the DOS 3.3 boot (I suspect not) or whether someone customised the boot routine.