Collocations for dealer - noun

authorized, licensed
It is always a good idea to sell through a licensed dealer.

independent, private
reputable
Always buy from a reputable dealer.

shady, unscrupulous
street
Addicts were forced to buy from street dealers.

drug
cocaine, crack, heroin, etc.
arms, firearms, gun
antique, antiques
art
auto (AmE), boat, car, used-car
scrap

offer, sell
art dealers offering period and regional paintings

through a/the dealer
She sold the painting through a Boston art dealer.

dealer in
a dealer in antiques