I never had a good experience there. The owner I find is generally rude. I've watched people come back 4 times with broken stuff. And when someone tried to point out about pricing one time, (Nov. 2012) the response was, "that what it sell for on Ebay, if you don't like it then leave my store" It is way too dirty to me, if you managed 2.5 hrs in there you've made it about 2 hours and ten minutes longer than my longest visit. Of course last time I was there after 15 I was inquired whether I was going to buy anything. He's also slightly changed his store name 3 times now due to bad Google, yelp, ect. reviews.
Don't get get me wrong he has an amazing amount of retro stuff. and if you just chat in general the staff seems nice. and occasionally you can get lucky with a price being off, for instance I had a friend get a NES metroid for a few bucks . but the cons always out weigh anything good for me.
In short Edison NJ has many cool things to see, Trade 1 is not one of those of those for me, it just makes me sad.