Hi, I've been repairing BCD since several years now. I've seen a lot of BCD brands and models.
Buying a used BCD is always a lottery. Besides the E-commerce refund policy mentioned by Angelo Farina, there is no warranty for the next several months after purchase. I have already repaired several "ready to use" BCDs bought used through e-commerce.
Used BCDs, no matter the external aspect and care taken, can suffer of broken flanges. Plastic in the flanges gets old and crystalize, leading to catastrophic failure. This is an expensive and hard to find repair that could lead to the BCD discard.
It seems that you are a new diver (at least your dives count), so going with a used BCD and specially an i3 is not a move I would recommend.
Experience means sometimes that you get familiar with gear maintenance and repair (by yourself or knowing where and who), so dealing with proprietary solutions like i3 and buying used gear is something that I would not recommend for you now.
Buying a used BCD is always a lottery. Besides the E-commerce refund policy mentioned by Angelo Farina, there is no warranty for the next several months after purchase. I have already repaired several "ready to use" BCDs bought used through e-commerce.
Used BCDs, no matter the external aspect and care taken, can suffer of broken flanges. Plastic in the flanges gets old and crystalize, leading to catastrophic failure. This is an expensive and hard to find repair that could lead to the BCD discard.
It seems that you are a new diver (at least your dives count), so going with a used BCD and specially an i3 is not a move I would recommend.
Experience means sometimes that you get familiar with gear maintenance and repair (by yourself or knowing where and who), so dealing with proprietary solutions like i3 and buying used gear is something that I would not recommend for you now.