Wow! This brings me back!
The first comic that started me collecting was Spiderman 126 at Vallas News in Weymouth Landing. I bought GS X-Men #1 in Columbian Square at a Pharmacy (they only had B&W books & GS comics), next door was a newsstand now called "Bets & Butts", but that's where I got most of my other books
My grandparents lived in Quincy and Comic Kingdom was one of the first comic shops I visited, if not the first. The "Mall" it was in was a repurposed Department Store, but with a near-Flea Market type business model - the spaces wee cheaply built into the gutted building and were pretty uniform in size, IIRC.
They had tons of Gil Kane cover roughs for $10 each I think - wish I'd bought them all, but I was barely in my teens.
When it first opened the place was packed, but it gradually dwindled to nothing as business dried up and stores closed. It was a craft shop after that, no idea what it is now.
There was also a book store in Brockton that sold back issues (and tons of porn). No idea what it was called, but I recall the owner being somewhat cantankerous. I had to beg my mortified grandmother to bring me there to buy Neal Adams GL/GA back issues (#76 = $3 - she nearly fainted!).
I used to sell at Sunday Funnies at the 57 alongside Mike Dreese & the Newbury Comics guys - long before they had their first shop. There was another con (or maybe Sunday Funnies moved?) in the lower level of an older Hotel across the street from the 57. Was at 57 when Bill Cole bought the Barks painting at auction & rode elevator down with him, the painting & my mom. She engaged him in small talk and he told her "all comic book dealers are crooks." Odd, as he was a comic book dealer....
Moved to Hartford in 1979 (only 1 comic shop, the pretty uninteresting Bookie in East Htfd) and then to Minneapolis in 1984 where I discovered Shinders at 7th & Hennepin (I talked a friend into moving out with me by telling him "There's a place where you can buy Marvel Triple Action #6 at 11pm on Sunday night!") and original College Of CB Knowledge.
Was a Hot Comics customer from 1989 until I moved back to MA in 1995 - get all my books at Harrison's in Salem these days, but I'm less and less interested in modern Marvel & DC comics, buying more hardcover collections and indie books than big 2.