krypticproscooters.com (pretty good)
east2west
sjyhighscoot
titetoys (pretty expensive)
inwardscooters.com (pretty good)
nolimitscooters.com
shopecx.com
gryndoscooters
kotascooter (rip off)
luckyscoot.com
skatehut.com
warscooters.com (kinda expensive)
freestyledepot (SUCKS, why i didnt mension it)
helloskater (new and pretty good)
dsa
beastiescooters.com (kinda sucks)
blazinride.com
amazon and eBay usually have pretty cheap stuff (you can get a blunt complete for 269.99 on eBay and you can get a pair of metalcores for 25$ on amazon, and rup's are 60, rp's are 40)
If you want used but fairly good and cheap parts go to craigslist and just look for scooters in your area
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thats all i can think of for now.