GiftcardMart has great customer service and good rates, my go to vendor for selling now. Though payout takes some time.
SaveYa is the other one, payouts are really fast :)

CardKangaroo was also good, very fast payouts but I don't have bulk seller status with them, so haven't dealt much.

The worst is GiftcardBin, sent them thrice and all three times, they just returned what I had sent citing reasons like - oh the giftcard has the value writte on it (which is easily erased with just rubbing alcohol), you sent more than $300 (i send 310 and even though their system accepted it), we don't accept this card now (after the system accepted it). I will never deal with them again, and I will advice everyone to stay away from them.

Apparently, it's a rolling 180 days though it might make sense to confirm from someone more experienced.

Sorry for the misunderstanding, that limit is just for Ebay. Since I have reached that limit, there is no point in me purchasing Ebay GC from anywhere.

The thing with Gyft is that it depends. I bought 3 cards today - 200, 40 and 300. Out of that, the 200 and 40 worked immediately while the 300 is not ready yet.

Same thing the other day - bought 1000 which was ready immediately but another 1000 was not ready. So depends on your luck! Also I am pretty close to the 180 days - $5000 limit, so gonna stay of ebay gift cards for another 3-4 months :)

Just checking, the $5000 limit is for 180 days right? Also, there is a rule which says no more than $500 GC can be used in one transaction, but I have used 1000 in one and it seemed to work. Any data points?