[sagher]

I agree!.. But not only that, I would also advise against buying second-hand SSD devices. SSD devices, unlike HDDs, degrade faster especially when not used carefully : it's generally advised to always keep sufficient free space on SSDs to keep the Write Amplification Factor (WAF) as low as possible.

Don't know about the WAF?... Read this for more:
Do SSDs Degrade Over Time?

Yes ! are right. but not really if you belong to Pakistan / India / Bangladesh etc. So i try to describe the reason why System pulled SSD is much better then any new one. 
All new SSD's came here from china. however it is Samsung or Kingston or SanDisk. all are specially made with low quality for these countries due to low market prices. 
at the other side the system pulled SSD's are specially made for branded systems which shipped from UK / USA. and those SSD's passed many survival tests. and long live and gives you more better results on random sq test read write. after an years. even more better then a new one like Laxer, kingdian, Kingston, etc ..