I avoided that place like the plague. you had to show up by 9:00am to get a decent spot and the temps were in the mid 90s with no sea breeze - it was crazy hot. I was over a friends house who had a pool
Any trade in offer will net less money then what you could get by selling directly. Its like trading in a car at a dealership vs. selling privately. I like the apple one over gazelle as you get faster turn around for the credit instead of waiting to hit your paypal account. Now if gazelle offers more $$ I'd opt for that over apple's