[3124508 on COMC]

Help me add to this list! I will edit OP.

Consignment companies selling large quantities of altered cards:
probstein123
pwcc_auctions
COMC (comc_consignment on eBay)
investinbaseball (Sean Bassik)
consignmints (Joe/Andrew Tuttle)

Gary Moser/ Brent Huigens:
ricky-leo (whitman111)

Mike Skerbe/Mark Skerbe/Rich Davis:
triplesssinc
crodneynow

Robert Block:
bottomdollarbuyer
bertscards
2000stonowdealer
showmethebucks

Will Jaimet (Vancouver Card Company, Cool Cards):
goca87
qut9 (deleted green star account)
(formerly rose-city-sports and rose-city-sports-2)
(Jesse Craig- formerly coloradocardstore)

Kevin Burge & Keith Koenig:
cginc1
got1morethanshaq
cardcontractor
liliswarriors
blackdactor
mcnabb4ever
(formerly queencity-sportscards)
(formerly kkoenig75)
(formerly psa.gems)
(formerly shoeless-joejackson)
(formerly thanksobamamoney)

Vinny Ho:
2006cardsbuyer
tonkabear23brons
avsports888

Orange County Sports Investments (OCSI)/ CardBuyer (Johnathan Miller, Scot Maxwell, Nate Johnson, Rich Katz, Doug Lowe):
COMC: HawkDynasty
COMC: cccardfactory
COMC: LORDSTANLEY2012
card-buyer
irvinecardco
hugeone
(formerly psa-set-guy)
(formerly infinitisportscards2007)
(formerly OCSI)
(formerly consign-your-stuff)
(formerly sold thousands of cards through investinbaseball)
allprosports (Doug Lowe)
1base2home (Doug Lowe)
COMC: highgradeplus (Doug Lowe)
Suspected COMC: NMtoMINT (Doug Lowe)

David Thorn:
smalltraditions
Small Traditions (smalltraditions.com)

Jeffrey Bridgman:
dominikhasek39

Steve Tormollan:
clearblueconsignment
(formerly etheljean2014)

Rod Iman:
rbisportsinc

Jeremy Bachman:
kane04
gradedstuff

Adam Rowe, Jason Rowe:
breakers.rowe
jrowejr25
COMC: breakersrowe
COMC: jimmertime7
(formerly gunther713)

Jason Koonce:
shopisagrading
otiasports (formerly worldwideinvestments)

Johnny Adams Jr.:
johnnyadamsjr

Evan Mathis:
cardology
cardquest12
acme.cards
quest4cards12
Unknown ID Coded as t***q (purple star)
no.bids.all.bins
COMC: StorageUnitFinds
COMC: DiamondGems

Chad Thyzel:
legendsandlegacies (formerly superiorsports)

SSI and associates (Bill Sliheet, Samir "Sam" Sliheet, Nathan Nichols, David Stone, etc.):
superiorsportsinvestments (formerly marketplacessi)
superiorsportsinv
alotofrookies
buyalldayandnight
gradethesecards
ngnichols1983
wwext
rookieparade
number1_49erfan
mansfield_sportscards
COMC: SuperiorSportsInvestments

Gary Enns and Dylan Enns:
COMC: DylansCards
dylans_sports_cards
farmer-Gary
collectorscornercards (Hundreds or thousands of cards active and sold from their subs)

Anthony Fernando:
psa-set-registry
xocompany
nationaltreasure
casehit
ronaldomessi
702tradingco

Brandon Taing:
rookiesonly99
metro-comics-cards

Justin Stafford:
mohawksportscards

Brian Deer and Neil Whiteley-Ross:
(formerly bristolcollectibles)
isellurcards
f.o.t.s.19
titletowntrading

Mike Souza:
9999rbush
psastock
10bccg10
(formerly j9suited)

Jason Stern:
thenandnowcollectibles (formerly unklbnz)

John & Kamala Slight:
sundiegocollectibles

Dennis Pevarnick:
bbcinv

Craig Roehrig:
quality*cards

Alex Peloquin:
mvpconsignments
fielder4mvp

Marcelo Franklin:
sandiegosd
2011kroman

Richard Rosino, Greg Rosino, Shaun Modisette:
kong53 (AKA kongscards53)
neweracards

Vahe Hekimian
vahessportscards

Charlie Barokas:
manontherock

Chad Davet:
seasonticket

Daniel Simancek Jr:
danjess33

Dominick Cirigliano:
domboski2005
tobycharlie2020

Gregory Libersher:
glibersher

Federico Ornes:
1972soccerstickers

Joe/Andrew Tuttle:
consignmints
thenatureboy-2010
superbowlauctions2

Gabriel Seraf (patch faker):
medstate9900