I have bought quite a few "used" lipos on here and never had much luck yet.
I have come to the conclusion....
Purchasing used lipo batteries are just like buying someone elses underwears.
Can they be used? .... Most likely
Are they "safe" to be used? .... The percentage leans towards NEVER
Will they get you out of a jam if you have none? .... Errrrr... At what cost???
Do you like the piece of mind knowing your under-kuckies are your own and clean every day ? .... I sure do
Do you like knowing every seconds life, use, abuse and charging the lipo in your RC has experienced? .... I sure do.
Buy those used lipo's if you must..... But........