welcome, Debs!

as to your Q, rarity is a relative measure. b/c of the label info, it sounds like an unlicensed ( black- or graymarket) product that is sold because of demand, but not necessarily distribution/reproduction rights.
does it look or sound like rare song versions are included? that would determine value to some extent.
also even if the songs are standard versions, some collectors really go for a encyclopedic collection of every version of a recording that ever saw the light of day, including bootlegs, and as such what you have may be valuable to one of them. especially if there are rare photos included in a booklet. see if there's anything listed on ebay or a fansite such as bassman.