Vintage T-Shirt Forum & Community Authentication Appraisals

Hi,
glad to have found this space for comparison, I find myself needing to sell a set of collectible t-shirts for a move, while I have identified the "authors" to whom they relate, I cannot define a valid quotation to try to sell them, maybe someone in this forum could help?

Thanks in advance!

BAND: Mano Negra
YEAR: 1991 (Patchanka Album)
MATERIAL:

Another one that I am certain will have niche appeal, France or other euro. But also can't find another example of this.