I sold for a collectibles shop on a commission basis for about a year, part time. I had some very good weeks. The biggest problem I had was not having enough stuff to sell.
Stuff I remember selling was.
Baccarat vase 80.00
Lot of Legos 50
Star Wars figurines 150
Lot of lego like toys 85.00
Planet of the Apes cards 30
Woody Guthrie record set 150
Elvis 2nd release of a song 45 50
Lot of 45s 250
Original plastic army men 35
Ted Williams signed baseball 'not validated' 195
Leather RIding gear 175
etc..
The company I worked for got their stuff from cleaning out houses.