Thanks for all these advices!!
Nevertheless, please could you let me know what is still available/repress today?
On the other hand i would like to let you know (specially for people outside uk) that i 've found an online shop where i can pick up 7" for 2.20€!! only bad points : it takes 3 to 4 weeks to receive package!
Therefore, if you have a look on this website, please let me know if you find interesting rocksteady 7" that i can buy!!!