Can you recomend me good and cheap stripboxes ?

[BandSaW]

Hi! Im going to buy two stripboxes. Want to use them for packshots, but portraits too. Found a nice offer on ebay ( ~50gbp each, 35x140cm + grid ). Im not sure if 35 cm wide will be enough for portraits. And what about quality ? ive seen one from elinchrom for 600 gbp, it makes diference. someone use them ? thanks for any help. still amateur and not much experience with studio lighting.

regards, Raf