I love Amoeba too. I bought that same Buckingham Nicks bootleg. I guess I don't have the most exacting audio standards, but to me, the quality is amazing. It has completely satiated my need to get Stevie and Lindsey to release Buckingham Nicks on CD.
I've also found some really good rare Counting Crows and Indigo Girls stuff there. Yay Amoeba. Yay independent music stores
Kevin