The Big Bang Theory DVD Set, Seasons 1-6

Big Bang Theory DVD set seasons 1-6 Seasons 1 through 4 are DVDs Seasons 5 & 6 are blu-ray dvds All come with slip covers, all DVDs are working The season 2 slipcover does have a small stain on the top right corner (shown in pictures) All slip covers have slight stains on the bottom from sitting on my bookshelf (shown in pictures) the DVDs are not damaged!! Pet friendly home! Will take reasonable offers!