LA
Lobos... near lax
Puzzle zoo - there two in la area i liked the santa monica one
Any Target - i got my wave 4s there
Kmart - i got my insecticon set here and motor master
Nyc
Forbidden plant - didn't have much when i was there (august)
Image anime - only place i saw mps
Tru - main one not much but the store is huge so go there last i suggest
Tru theres a tru express they actually have better stock then flagship ... flagship too busy and restock not in time blah blah
I got the most my stuff in canada giving the aud vs usd. At least aud vs canadian dollar was better.
Hope this helps