There's tons of Marley stuff put out by marginal labels so it's hard to tell what Weller might be referring to.
Amazon shows three titles.
One is compilation of stuff that is better available on the proper Tuff Gong releases.
This one looks like a nice selection of songs, many of them early stuff and some Tosh songs.
This one is an interesting mix of older stuff and some newer less popular stuff.
Like PJ said, the quality on these no-name label discs can be sub-par.
I think the Songs of Freedom boxset is great, albeit expensive. It's career-spanning, so you get some of everything.