In Karachi, I saw some A/c wala imported fresh pieces of sanden 507 and 505. He was in Johar besides Mehmil CNG
At that time, we installed Lianden 507(Copy of Sanden) in Corolla
Both vendors provided 1 year warranty but importer of Sanden told that warranty will be reduced to 6 months if I only take compressor by him and do installation from outside
For a/c works, my 3 and half decades of experience says never go for used or Kabli parts. U can use kabli in other spare parts but never for A/c infact all HVAC parts. Always buy them new